78424792416 has 36 divisors (see below), whose sum is σ = 223020504252. Its totient is φ = 26141597376.

The previous prime is 78424792399. The next prime is 78424792471. The reversal of 78424792416 is 61429742487.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78424792416² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136153866 + ... + 136154441.

It is an arithmetic number, because the mean of its divisors is an integer number (6195014007).

Almost surely, 2^78424792416 is an apocalyptic number.

It is an amenable number.

78424792416 is an abundant number, since it is smaller than the sum of its proper divisors (144595711836).

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

78424792416 is a wasteful number, since it uses less digits than its factorization.

78424792416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272308323 (or 272308312 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 78424792416 in words is "seventy-eight billion, four hundred twenty-four million, seven hundred ninety-two thousand, four hundred sixteen".