78371834840 has 64 divisors (see below), whose sum is σ = 198157579200. Its totient is φ = 27679145472.

The previous prime is 78371834839. The next prime is 78371834851. The reversal of 78371834840 is 4843817387.

It is a super-2 number, since 2×78371834840² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3264455 + ... + 3288374.

It is an arithmetic number, because the mean of its divisors is an integer number (3096212175).

Almost surely, 2^78371834840 is an apocalyptic number.

It is an amenable number.

78371834840 is an abundant number, since it is smaller than the sum of its proper divisors (119785744360).

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

78371834840 is a wasteful number, since it uses less digits than its factorization.

78371834840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552876 (or 6552872 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 78371834840 in words is "seventy-eight billion, three hundred seventy-one million, eight hundred thirty-four thousand, eight hundred forty".