125955558855 has 24 divisors (see below), whose sum is σ = 249511964832. Its totient is φ = 57579683904.

The previous prime is 125955558821. The next prime is 125955558871. The reversal of 125955558855 is 558855559521.

125955558855 is a `hidden beast` number, since 1 + 25 + 9 + 5 + 5 + 558 + 8 + 55 = 666.

It is not a de Polignac number, because 125955558855 - 2⁹ = 125955558343 is a prime.

It is a super-2 number, since 2×125955558855² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 125955558792 and 125955558801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199929144 + ... + 199929773.

It is an arithmetic number, because the mean of its divisors is an integer number (10396331868).

Almost surely, 2^125955558855 is an apocalyptic number.

125955558855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125955558855 is a deficient number, since it is larger than the sum of its proper divisors (123556405977).

125955558855 is a wasteful number, since it uses less digits than its factorization.

125955558855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399858935 (or 399858932 counting only the distinct ones).

The product of its digits is 90000000, while the sum is 63.

The spelling of 125955558855 in words is "one hundred twenty-five billion, nine hundred fifty-five million, five hundred fifty-eight thousand, eight hundred fifty-five".