78320433792 has 64 divisors (see below), whose sum is σ = 209879818560. Its totient is φ = 25875763200.

The previous prime is 78320433677. The next prime is 78320433827. The reversal of 78320433792 is 29733402387.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×78320433792² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 859084 + ... + 945867.

It is an arithmetic number, because the mean of its divisors is an integer number (3279372165).

Almost surely, 2^78320433792 is an apocalyptic number.

It is an amenable number.

78320433792 is an abundant number, since it is smaller than the sum of its proper divisors (131559384768).

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

78320433792 is a wasteful number, since it uses less digits than its factorization.

78320433792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805081 (or 1805069 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 78320433792 in words is "seventy-eight billion, three hundred twenty million, four hundred thirty-three thousand, seven hundred ninety-two".