56623551531 has 8 divisors (see below), whose sum is σ = 75507655824. Its totient is φ = 37744240800.

The previous prime is 56623551473. The next prime is 56623551539. The reversal of 56623551531 is 13515532665.

56623551531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56623551531 - 2⁷ = 56623551403 is a prime.

It is a super-2 number, since 2×56623551531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56623551539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170736 + ... + 1218141.

It is an arithmetic number, because the mean of its divisors is an integer number (9438456978).

Almost surely, 2^56623551531 is an apocalyptic number.

56623551531 is a deficient number, since it is larger than the sum of its proper divisors (18884104293).

56623551531 is a wasteful number, since it uses less digits than its factorization.

56623551531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396781.

The product of its digits is 405000, while the sum is 42.

The spelling of 56623551531 in words is "fifty-six billion, six hundred twenty-three million, five hundred fifty-one thousand, five hundred thirty-one".