43972979264 has 14 divisors (see below), whose sum is σ = 87258880854. Its totient is φ = 21986489600.

The previous prime is 43972979227. The next prime is 43972979311. The reversal of 43972979264 is 46297927934.

43972979264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 25661476864 + 18311502400 = 160192^2 + 135320^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43972979197 and 43972979206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343538837 + ... + 343538964.

Almost surely, 2^43972979264 is an apocalyptic number.

It is an amenable number.

43972979264 is a deficient number, since it is larger than the sum of its proper divisors (43285901590).

43972979264 is an equidigital number, since it uses as much as digits as its factorization.

43972979264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687077813 (or 687077803 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 62.

The spelling of 43972979264 in words is "forty-three billion, nine hundred seventy-two million, nine hundred seventy-nine thousand, two hundred sixty-four".