56161600997 has 16 divisors (see below), whose sum is σ = 59758560000. Its totient is φ = 52662584832.

The previous prime is 56161600991. The next prime is 56161601009. The reversal of 56161600997 is 79900616165.

It is a cyclic number.

It is not a de Polignac number, because 56161600997 - 2⁴ = 56161600981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56161600991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1504088 + ... + 1540974.

It is an arithmetic number, because the mean of its divisors is an integer number (3734910000).

Almost surely, 2^56161600997 is an apocalyptic number.

It is an amenable number.

56161600997 is a deficient number, since it is larger than the sum of its proper divisors (3596959003).

56161600997 is a wasteful number, since it uses less digits than its factorization.

56161600997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38212.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 56161600997 in words is "fifty-six billion, one hundred sixty-one million, six hundred thousand, nine hundred ninety-seven".