78155077832 has 32 divisors (see below), whose sum is σ = 158154084480. Its totient is φ = 35993643840.

The previous prime is 78155077787. The next prime is 78155077919. The reversal of 78155077832 is 23877055187.

It is a super-2 number, since 2×78155077832² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763394 + ... + 859697.

It is an arithmetic number, because the mean of its divisors is an integer number (4942315140).

Almost surely, 2^78155077832 is an apocalyptic number.

It is an amenable number.

78155077832 is an abundant number, since it is smaller than the sum of its proper divisors (79999006648).

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

78155077832 is a wasteful number, since it uses less digits than its factorization.

78155077832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623573 (or 1623569 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 53.

The spelling of 78155077832 in words is "seventy-eight billion, one hundred fifty-five million, seventy-seven thousand, eight hundred thirty-two".