124999999999999 has 16 divisors (see below), whose sum is σ = 131641840000000. Its totient is φ = 118364453232480.

The previous prime is 124999999999957. The next prime is 125000000000011. The reversal of 124999999999999 is 999999999999421.

It is a Cunningham number, because it is equal to 50000³-1.

It is a cyclic number.

It is not a de Polignac number, because 124999999999999 - 2⁹ = 124999999999487 is a prime.

It is a super-9 number, since 9×124999999999999⁹ (a number of 128 digits) contains 999999999 as substring.

It is a Duffinian number.

124999999999999 is a modest number, since divided by 99999999 gives 1249999 as remainder.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 124999999999892 and 124999999999901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124999991999999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155477894 + ... + 2155535884.

It is an arithmetic number, because the mean of its divisors is an integer number (8227615000000).

Almost surely, 2^{124999999999999} is an apocalyptic number.

124999999999999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124999999999999 is a deficient number, since it is larger than the sum of its proper divisors (6641840000001).

124999999999999 is a wasteful number, since it uses less digits than its factorization.

124999999999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110278.

The product of its digits is 2259436291848, while the sum is 115.

It can be divided in two parts, 1 and 24999999999999, that added together give a square (25000000000000 = 5000000²).

The spelling of 124999999999999 in words is "one hundred twenty-four trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".