43640073892 has 6 divisors (see below), whose sum is σ = 76370129318. Its totient is φ = 21820036944.

The previous prime is 43640073887. The next prime is 43640073979. The reversal of 43640073892 is 29837004634.

It can be written as a sum of positive squares in only one way, i.e., 37816247296 + 5823826596 = 194464^2 + 76314^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5455009233 + ... + 5455009240.

Almost surely, 2^43640073892 is an apocalyptic number.

It is an amenable number.

43640073892 is a deficient number, since it is larger than the sum of its proper divisors (32730055426).

43640073892 is a wasteful number, since it uses less digits than its factorization.

43640073892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910018477 (or 10910018475 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 43640073892 in words is "forty-three billion, six hundred forty million, seventy-three thousand, eight hundred ninety-two".