40440864868 has 96 divisors (see below), whose sum is σ = 82221834240. Its totient is φ = 17276613120.

The previous prime is 40440864859. The next prime is 40440864929. The reversal of 40440864868 is 86846804404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4120455 + ... + 4130257.

It is an arithmetic number, because the mean of its divisors is an integer number (856477440).

Almost surely, 2^40440864868 is an apocalyptic number.

It is an amenable number.

40440864868 is an abundant number, since it is smaller than the sum of its proper divisors (41780969372).

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

40440864868 is a wasteful number, since it uses less digits than its factorization.

40440864868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9977 (or 9975 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 52.

The spelling of 40440864868 in words is "forty billion, four hundred forty million, eight hundred sixty-four thousand, eight hundred sixty-eight".