56125563123321 has 16 divisors (see below), whose sum is σ = 86764155553920. Its totient is φ = 35790214165200.

The previous prime is 56125563123283. The next prime is 56125563123337. The reversal of 56125563123321 is 12332136552165.

56125563123321 is a `hidden beast` number, since 5 + 6 + 1 + 2 + 5 + 5 + 6 + 312 + 3 + 321 = 666.

It is not a de Polignac number, because 56125563123321 - 2²¹ = 56125561026169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56125563123341) 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, 45189663730 + ... + 45189664971.

It is an arithmetic number, because the mean of its divisors is an integer number (5422759722120).

Almost surely, 2^{56125563123321} is an apocalyptic number.

It is an amenable number.

56125563123321 is a deficient number, since it is larger than the sum of its proper divisors (30638592430599).

56125563123321 is a wasteful number, since it uses less digits than its factorization.

56125563123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90379328733 (or 90379328727 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

Adding to 56125563123321 its reverse (12332136552165), we get a palindrome (68457699675486).

The spelling of 56125563123321 in words is "fifty-six trillion, one hundred twenty-five billion, five hundred sixty-three million, one hundred twenty-three thousand, three hundred twenty-one".