125165556601974 has 144 divisors (see below), whose sum is σ = 317626233930720. Its totient is φ = 35517065068800.

The previous prime is 125165556601937. The next prime is 125165556601993. The reversal of 125165556601974 is 479106655561521.

125165556601974 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 6 + 5 + 556 + 6 + 0 + 1 + 9 + 74 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 629718312 + ... + 629917044.

It is an arithmetic number, because the mean of its divisors is an integer number (2205737735630).

Almost surely, 2^{125165556601974} is an apocalyptic number.

125165556601974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125165556601974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158813116965360).

125165556601974 is an abundant number, since it is smaller than the sum of its proper divisors (192460677328746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125165556601974 is a wasteful number, since it uses less digits than its factorization.

125165556601974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203635 (or 203625 counting only the distinct ones).

The product of its (nonzero) digits is 68040000, while the sum is 63.

The spelling of 125165556601974 in words is "one hundred twenty-five trillion, one hundred sixty-five billion, five hundred fifty-six million, six hundred one thousand, nine hundred seventy-four".