78399288232 has 32 divisors (see below), whose sum is σ = 154814220000. Its totient is φ = 37117597248.

The previous prime is 78399288211. The next prime is 78399288281. The reversal of 78399288232 is 23288299387.

It is a super-2 number, since 2×78399288232² (a number of 23 digits) contains 22 as substring.

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, 170494 + ... + 431122.

It is an arithmetic number, because the mean of its divisors is an integer number (4837944375).

Almost surely, 2^78399288232 is an apocalyptic number.

It is an amenable number.

78399288232 is a deficient number, since it is larger than the sum of its proper divisors (76414931768).

78399288232 is a wasteful number, since it uses less digits than its factorization.

78399288232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262633 (or 262629 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The spelling of 78399288232 in words is "seventy-eight billion, three hundred ninety-nine million, two hundred eighty-eight thousand, two hundred thirty-two".