125656442451 has 16 divisors (see below), whose sum is σ = 186168729600. Its totient is φ = 83765994984.

The previous prime is 125656442447. The next prime is 125656442459. The reversal of 125656442451 is 154244656521.

125656442451 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 564 + 42 + 45 + 1 = 666.

It is not a de Polignac number, because 125656442451 - 2² = 125656442447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125656442397 and 125656442406.

It is not an unprimeable number, because it can be changed into a prime (125656442459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358330 + ... + 616208.

It is an arithmetic number, because the mean of its divisors is an integer number (11635545600).

Almost surely, 2^125656442451 is an apocalyptic number.

125656442451 is a deficient number, since it is larger than the sum of its proper divisors (60512287149).

125656442451 is a wasteful number, since it uses less digits than its factorization.

125656442451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275935 (or 275929 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 125656442451 in words is "one hundred twenty-five billion, six hundred fifty-six million, four hundred forty-two thousand, four hundred fifty-one".