56166501601 has 4 divisors (see below), whose sum is σ = 64190287552. Its totient is φ = 48142715652.

The previous prime is 56166501583. The next prime is 56166501613. The reversal of 56166501601 is 10610566165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56166501601 - 2⁹ = 56166501089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56166501641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4011892965 + ... + 4011892978.

It is an arithmetic number, because the mean of its divisors is an integer number (16047571888).

Almost surely, 2^56166501601 is an apocalyptic number.

It is an amenable number.

56166501601 is a deficient number, since it is larger than the sum of its proper divisors (8023785951).

56166501601 is an equidigital number, since it uses as much as digits as its factorization.

56166501601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023785950.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 56166501601 in words is "fifty-six billion, one hundred sixty-six million, five hundred one thousand, six hundred one".