125817878455 has 8 divisors (see below), whose sum is σ = 153830161152. Its totient is φ = 98755164768.

The previous prime is 125817878449. The next prime is 125817878479. The reversal of 125817878455 is 554878718521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125817878455 - 2³ = 125817878447 is a prime.

It is a super-3 number, since 3×125817878455³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125817878393 and 125817878402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237391959 + ... + 237392488.

It is an arithmetic number, because the mean of its divisors is an integer number (19228770144).

Almost surely, 2^125817878455 is an apocalyptic number.

125817878455 is a deficient number, since it is larger than the sum of its proper divisors (28012282697).

125817878455 is an equidigital number, since it uses as much as digits as its factorization.

125817878455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474784505.

The product of its digits is 25088000, while the sum is 61.

The spelling of 125817878455 in words is "one hundred twenty-five billion, eight hundred seventeen million, eight hundred seventy-eight thousand, four hundred fifty-five".