56565678751 has 4 divisors (see below), whose sum is σ = 59025056112. Its totient is φ = 54106301392.

The previous prime is 56565678733. The next prime is 56565678781. The reversal of 56565678751 is 15787656565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15787656565 = 5 ⋅3157531313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56565678751 is a prime.

It is a super-2 number, since 2×56565678751² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56565678751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56565678781) 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, 1229688646 + ... + 1229688691.

It is an arithmetic number, because the mean of its divisors is an integer number (14756264028).

Almost surely, 2^56565678751 is an apocalyptic number.

56565678751 is a deficient number, since it is larger than the sum of its proper divisors (2459377361).

56565678751 is a wasteful number, since it uses less digits than its factorization.

56565678751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459377360.

The product of its digits is 52920000, while the sum is 61.

The spelling of 56565678751 in words is "fifty-six billion, five hundred sixty-five million, six hundred seventy-eight thousand, seven hundred fifty-one".