125139899015 has 4 divisors (see below), whose sum is σ = 150167878824. Its totient is φ = 100111919208.

The previous prime is 125139899011. The next prime is 125139899033. The reversal of 125139899015 is 510998931521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125139899015 - 2² = 125139899011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139899011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12513989897 + ... + 12513989906.

It is an arithmetic number, because the mean of its divisors is an integer number (37541969706).

Almost surely, 2^125139899015 is an apocalyptic number.

125139899015 is a deficient number, since it is larger than the sum of its proper divisors (25027979809).

125139899015 is an equidigital number, since it uses as much as digits as its factorization.

125139899015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25027979808.

The product of its (nonzero) digits is 874800, while the sum is 53.

The spelling of 125139899015 in words is "one hundred twenty-five billion, one hundred thirty-nine million, eight hundred ninety-nine thousand, fifteen".