56142925079921 has 2 divisors, whose sum is σ = 56142925079922. Its totient is φ = 56142925079920.

The previous prime is 56142925079911. The next prime is 56142925079933. The reversal of 56142925079921 is 12997052924165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30374306441521 + 25768618638400 = 5511289^2 + 5076280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56142925079921 is a prime.

It is not a weakly prime, because it can be changed into another prime (56142925079911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28071462539960 + 28071462539961.

It is an arithmetic number, because the mean of its divisors is an integer number (28071462539961).

Almost surely, 2^{56142925079921} is an apocalyptic number.

It is an amenable number.

56142925079921 is a deficient number, since it is larger than the sum of its proper divisors (1).

56142925079921 is an equidigital number, since it uses as much as digits as its factorization.

56142925079921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24494400, while the sum is 62.

The spelling of 56142925079921 in words is "fifty-six trillion, one hundred forty-two billion, nine hundred twenty-five million, seventy-nine thousand, nine hundred twenty-one".