56921056361 has 16 divisors (see below), whose sum is σ = 64955447424. Its totient is φ = 49413690624.

The previous prime is 56921056333. The next prime is 56921056369. The reversal of 56921056361 is 16365012965.

It is a cyclic number.

It is not a de Polignac number, because 56921056361 - 2¹⁴ = 56921039977 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (56921056369) 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, 190316 + ... + 387378.

It is an arithmetic number, because the mean of its divisors is an integer number (4059715464).

Almost surely, 2^56921056361 is an apocalyptic number.

It is an amenable number.

56921056361 is a deficient number, since it is larger than the sum of its proper divisors (8034391063).

56921056361 is a wasteful number, since it uses less digits than its factorization.

56921056361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198400.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 56921056361 in words is "fifty-six billion, nine hundred twenty-one million, fifty-six thousand, three hundred sixty-one".