40431318564 has 48 divisors (see below), whose sum is σ = 116110456448. Its totient is φ = 10663204608.

The previous prime is 40431318563. The next prime is 40431318593. The reversal of 40431318564 is 46581313404.

It is a happy number.

40431318564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (40431318563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18511417 + ... + 18513600.

Almost surely, 2^40431318564 is an apocalyptic number.

It is an amenable number.

40431318564 is an abundant number, since it is smaller than the sum of its proper divisors (75679137884).

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

40431318564 is a wasteful number, since it uses less digits than its factorization.

40431318564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37025044 (or 37025042 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 40431318564 in words is "forty billion, four hundred thirty-one million, three hundred eighteen thousand, five hundred sixty-four".