78878644974 has 96 divisors (see below), whose sum is σ = 178790976000. Its totient is φ = 25113094272.

The previous prime is 78878644919. The next prime is 78878644993. The reversal of 78878644974 is 47944687887.

78878644974 is a `hidden beast` number, since 7 + 8 + 8 + 78 + 64 + 497 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6932362 + ... + 6943730.

It is an arithmetic number, because the mean of its divisors is an integer number (1862406000).

Almost surely, 2^78878644974 is an apocalyptic number.

78878644974 is an abundant number, since it is smaller than the sum of its proper divisors (99912331026).

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

78878644974 is a wasteful number, since it uses less digits than its factorization.

78878644974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11622 (or 11619 counting only the distinct ones).

The product of its digits is 606928896, while the sum is 72.

The spelling of 78878644974 in words is "seventy-eight billion, eight hundred seventy-eight million, six hundred forty-four thousand, nine hundred seventy-four".