56651216567 has 4 divisors (see below), whose sum is σ = 61801327176. Its totient is φ = 51501105960.

The previous prime is 56651216513. The next prime is 56651216597. The reversal of 56651216567 is 76561215665.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56651216567 is a prime.

It is a super-2 number, since 2×56651216567² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56651216597) 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, 2575055288 + ... + 2575055309.

It is an arithmetic number, because the mean of its divisors is an integer number (15450331794).

Almost surely, 2^56651216567 is an apocalyptic number.

56651216567 is a deficient number, since it is larger than the sum of its proper divisors (5150110609).

56651216567 is a wasteful number, since it uses less digits than its factorization.

56651216567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150110608.

The product of its digits is 2268000, while the sum is 50.

The spelling of 56651216567 in words is "fifty-six billion, six hundred fifty-one million, two hundred sixteen thousand, five hundred sixty-seven".