78378579188 has 48 divisors (see below), whose sum is σ = 168879621120. Its totient is φ = 30995115264.

The previous prime is 78378579179. The next prime is 78378579211. The reversal of 78378579188 is 88197587387.

It is a super-2 number, since 2×78378579188² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950120 + ... + 1029312.

It is an arithmetic number, because the mean of its divisors is an integer number (3518325440).

Almost surely, 2^78378579188 is an apocalyptic number.

It is an amenable number.

78378579188 is an abundant number, since it is smaller than the sum of its proper divisors (90501041932).

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

78378579188 is a wasteful number, since it uses less digits than its factorization.

78378579188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81936 (or 81934 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 71.

The spelling of 78378579188 in words is "seventy-eight billion, three hundred seventy-eight million, five hundred seventy-nine thousand, one hundred eighty-eight".