56640060761 has 4 divisors (see below), whose sum is σ = 58170873252. Its totient is φ = 55109248272.

The previous prime is 56640060749. The next prime is 56640060773. The reversal of 56640060761 is 16706004665.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56640060749) and next prime (56640060773).

It can be written as a sum of positive squares in 2 ways, for example, as 29701075600 + 26938985161 = 172340^2 + 164131^2 .

It is a cyclic number.

It is not a de Polignac number, because 56640060761 - 2¹⁰ = 56640059737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56640060731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765406190 + ... + 765406263.

It is an arithmetic number, because the mean of its divisors is an integer number (14542718313).

Almost surely, 2^56640060761 is an apocalyptic number.

It is an amenable number.

56640060761 is a deficient number, since it is larger than the sum of its proper divisors (1530812491).

56640060761 is a wasteful number, since it uses less digits than its factorization.

56640060761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530812490.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 56640060761 in words is "fifty-six billion, six hundred forty million, sixty thousand, seven hundred sixty-one".