78407294784 has 112 divisors (see below), whose sum is σ = 255326375808. Its totient is φ = 20678842368.

The previous prime is 78407294747. The next prime is 78407294807. The reversal of 78407294784 is 48749270487.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×78407294784² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) 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, 2226327 + ... + 2261270.

It is an arithmetic number, because the mean of its divisors is an integer number (2279699784).

Almost surely, 2^78407294784 is an apocalyptic number.

It is an amenable number.

78407294784 is an abundant number, since it is smaller than the sum of its proper divisors (176919081024).

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

78407294784 is a wasteful number, since it uses less digits than its factorization.

78407294784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487632 (or 4487622 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 60.

The spelling of 78407294784 in words is "seventy-eight billion, four hundred seven million, two hundred ninety-four thousand, seven hundred eighty-four".