56623381585 has 16 divisors (see below), whose sum is σ = 68630276880. Its totient is φ = 44844606720.

The previous prime is 56623381583. The next prime is 56623381589. The reversal of 56623381585 is 58518332665.

It can be written as a sum of positive squares in 8 ways, for example, as 51710481 + 56571671104 = 7191^2 + 237848^2 .

It is not a de Polignac number, because 56623381585 - 2¹ = 56623381583 is a prime.

It is a super-2 number, since 2×56623381585² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56623381583) 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, 599659 + ... + 687631.

It is an arithmetic number, because the mean of its divisors is an integer number (4289392305).

Almost surely, 2^56623381585 is an apocalyptic number.

It is an amenable number.

56623381585 is a deficient number, since it is larger than the sum of its proper divisors (12006895295).

56623381585 is a wasteful number, since it uses less digits than its factorization.

56623381585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89268.

The product of its digits is 5184000, while the sum is 52.

The spelling of 56623381585 in words is "fifty-six billion, six hundred twenty-three million, three hundred eighty-one thousand, five hundred eighty-five".