56644355669 has 8 divisors (see below), whose sum is σ = 61796507040. Its totient is φ = 51492648400.

The previous prime is 56644355659. The next prime is 56644355681. The reversal of 56644355669 is 96655344665.

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

It is a cyclic number.

It is not a de Polignac number, because 56644355669 - 2¹² = 56644351573 is a prime.

It is a super-2 number, since 2×56644355669² (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 (56644355659) 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, 191534 + ... + 387264.

It is an arithmetic number, because the mean of its divisors is an integer number (7724563380).

Almost surely, 2^56644355669 is an apocalyptic number.

It is an amenable number.

56644355669 is a deficient number, since it is larger than the sum of its proper divisors (5152151371).

56644355669 is a wasteful number, since it uses less digits than its factorization.

56644355669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222051.

The product of its digits is 69984000, while the sum is 59.

The spelling of 56644355669 in words is "fifty-six billion, six hundred forty-four million, three hundred fifty-five thousand, six hundred sixty-nine".