40120520784 has 20 divisors (see below), whose sum is σ = 103644678816. Its totient is φ = 13373506912.

The previous prime is 40120520777. The next prime is 40120520801. The reversal of 40120520784 is 48702502104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417922044 + ... + 417922139.

Almost surely, 2^40120520784 is an apocalyptic number.

It is an amenable number.

40120520784 is an abundant number, since it is smaller than the sum of its proper divisors (63524158032).

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

40120520784 is a wasteful number, since it uses less digits than its factorization.

40120520784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835844194 (or 835844188 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The spelling of 40120520784 in words is "forty billion, one hundred twenty million, five hundred twenty thousand, seven hundred eighty-four".