56107533561 has 16 divisors (see below), whose sum is σ = 75057071040. Its totient is φ = 37281715200.

The previous prime is 56107533541. The next prime is 56107533569. The reversal of 56107533561 is 16533570165.

It is not a de Polignac number, because 56107533561 - 2⁵ = 56107533529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56107533569) 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, 1090921 + ... + 1141193.

It is an arithmetic number, because the mean of its divisors is an integer number (4691066940).

Almost surely, 2^56107533561 is an apocalyptic number.

It is an amenable number.

56107533561 is a deficient number, since it is larger than the sum of its proper divisors (18949537479).

56107533561 is a wasteful number, since it uses less digits than its factorization.

56107533561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51496.

The product of its (nonzero) digits is 283500, while the sum is 42.

The spelling of 56107533561 in words is "fifty-six billion, one hundred seven million, five hundred thirty-three thousand, five hundred sixty-one".