43664044656 has 40 divisors (see below), whose sum is σ = 113215047424. Its totient is φ = 14500969920.

The previous prime is 43664044649. The next prime is 43664044663. The reversal of 43664044656 is 65644046634.

It is an interprime number because it is at equal distance from previous prime (43664044649) and next prime (43664044663).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1665346 + ... + 1691361.

Almost surely, 2^43664044656 is an apocalyptic number.

It is an amenable number.

43664044656 is an abundant number, since it is smaller than the sum of its proper divisors (69551002768).

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

43664044656 is a wasteful number, since it uses less digits than its factorization.

43664044656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356989 (or 3356983 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 43664044656 in words is "forty-three billion, six hundred sixty-four million, forty-four thousand, six hundred fifty-six".