56223961644 has 24 divisors (see below), whose sum is σ = 138093941440. Its totient is φ = 17754935184.

The previous prime is 56223961639. The next prime is 56223961649. The reversal of 56223961644 is 44616932265.

It is an interprime number because it is at equal distance from previous prime (56223961639) and next prime (56223961649).

It is a super-2 number, since 2×56223961644² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56223961593 and 56223961602.

It is not an unprimeable number, because it can be changed into a prime (56223961649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123297934 + ... + 123298389.

Almost surely, 2^56223961644 is an apocalyptic number.

It is an amenable number.

56223961644 is an abundant number, since it is smaller than the sum of its proper divisors (81869979796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56223961644 is a wasteful number, since it uses less digits than its factorization.

56223961644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246596349 (or 246596347 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The spelling of 56223961644 in words is "fifty-six billion, two hundred twenty-three million, nine hundred sixty-one thousand, six hundred forty-four".