78279253974 has 24 divisors (see below), whose sum is σ = 173213670240. Its totient is φ = 25537912368.

The previous prime is 78279253963. The next prime is 78279253979. The reversal of 78279253974 is 47935297287.

78279253974 is a `hidden beast` number, since 7 + 8 + 2 + 7 + 92 + 539 + 7 + 4 = 666.

It is a super-2 number, since 2×78279253974² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78279253979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46263489 + ... + 46265180.

It is an arithmetic number, because the mean of its divisors is an integer number (7217236260).

Almost surely, 2^78279253974 is an apocalyptic number.

78279253974 is an abundant number, since it is smaller than the sum of its proper divisors (94934416266).

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

78279253974 is a wasteful number, since it uses less digits than its factorization.

78279253974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92528724 (or 92528721 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 78279253974 in words is "seventy-eight billion, two hundred seventy-nine million, two hundred fifty-three thousand, nine hundred seventy-four".