40644571932 has 24 divisors (see below), whose sum is σ = 105374816400. Its totient is φ = 13548190608.

The previous prime is 40644571921. The next prime is 40644571949. The reversal of 40644571932 is 23917544604.

40644571932 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 457 + 193 + 2 = 666.

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, 188169207 + ... + 188169422.

It is an arithmetic number, because the mean of its divisors is an integer number (4390617350).

Almost surely, 2^40644571932 is an apocalyptic number.

It is an amenable number.

40644571932 is an abundant number, since it is smaller than the sum of its proper divisors (64730244468).

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

40644571932 is a wasteful number, since it uses less digits than its factorization.

40644571932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376338642 (or 376338634 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 40644571932 in words is "forty billion, six hundred forty-four million, five hundred seventy-one thousand, nine hundred thirty-two".