56344662561 has 16 divisors (see below), whose sum is σ = 81972803520. Its totient is φ = 34141225920.

The previous prime is 56344662497. The next prime is 56344662581. The reversal of 56344662561 is 16526644365.

It is not a de Polignac number, because 56344662561 - 2⁶ = 56344662497 is a prime.

It is a super-2 number, since 2×56344662561² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56344662561.

It is not an unprimeable number, because it can be changed into a prime (56344662581) 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 15 ways as a sum of consecutive naturals, for example, 11910 + ... + 335903.

It is an arithmetic number, because the mean of its divisors is an integer number (5123300220).

Almost surely, 2^56344662561 is an apocalyptic number.

It is an amenable number.

56344662561 is a deficient number, since it is larger than the sum of its proper divisors (25628140959).

56344662561 is a wasteful number, since it uses less digits than its factorization.

56344662561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352736.

The product of its digits is 3110400, while the sum is 48.

The spelling of 56344662561 in words is "fifty-six billion, three hundred forty-four million, six hundred sixty-two thousand, five hundred sixty-one".