78492224844 has 72 divisors (see below), whose sum is σ = 225859076352. Its totient is φ = 22751366880.

The previous prime is 78492224831. The next prime is 78492224857. The reversal of 78492224844 is 44842229487.

78492224844 is a `hidden beast` number, since 78 + 4 + 92 + 2 + 2 + 484 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (78492224831) and next prime (78492224857).

It is a super-2 number, since 2×78492224844² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4299864 + ... + 4318079.

It is an arithmetic number, because the mean of its divisors is an integer number (3136931616).

Almost surely, 2^78492224844 is an apocalyptic number.

It is an amenable number.

78492224844 is an abundant number, since it is smaller than the sum of its proper divisors (147366851508).

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

78492224844 is a wasteful number, since it uses less digits than its factorization.

78492224844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8617987 (or 8617982 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The spelling of 78492224844 in words is "seventy-eight billion, four hundred ninety-two million, two hundred twenty-four thousand, eight hundred forty-four".