909864745940 has 24 divisors (see below), whose sum is σ = 1993790574720. Its totient is φ = 348122163488.

The previous prime is 909864745901. The next prime is 909864745961. The reversal of 909864745940 is 49547468909.

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, 988982960 + ... + 988983879.

It is an arithmetic number, because the mean of its divisors is an integer number (83074607280).

Almost surely, 2^909864745940 is an apocalyptic number.

It is an amenable number.

909864745940 is an abundant number, since it is smaller than the sum of its proper divisors (1083925828780).

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

909864745940 is a wasteful number, since it uses less digits than its factorization.

909864745940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977966871 (or 1977966869 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 909864745940 in words is "nine hundred nine billion, eight hundred sixty-four million, seven hundred forty-five thousand, nine hundred forty".