78867037440 has 108 divisors (see below), whose sum is σ = 272871774084. Its totient is φ = 21031206912.

The previous prime is 78867037423. The next prime is 78867037477. The reversal of 78867037440 is 4473076887.

It can be written as a sum of positive squares in 2 ways, for example, as 41596418304 + 37270619136 = 203952^2 + 193056^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3411529 + ... + 3434568.

Almost surely, 2^78867037440 is an apocalyptic number.

It is an amenable number.

78867037440 is an abundant number, since it is smaller than the sum of its proper divisors (194004736644).

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

78867037440 is a wasteful number, since it uses less digits than its factorization.

78867037440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846124 (or 6846107 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 78867037440 in words is "seventy-eight billion, eight hundred sixty-seven million, thirty-seven thousand, four hundred forty".