78712422912 has 90 divisors (see below), whose sum is σ = 227224360077. Its totient is φ = 26231126016.

The previous prime is 78712422863. The next prime is 78712422931. The reversal of 78712422912 is 21922421787.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

78712422912 is a `hidden beast` number, since 78 + 71 + 2 + 422 + 91 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 73888286976 + 4824135936 = 271824^2 + 69456^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198384.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19042798 + ... + 19046930.

Almost surely, 2^78712422912 is an apocalyptic number.

78712422912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78712422912

78712422912 is an abundant number, since it is smaller than the sum of its proper divisors (148511937165).

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

78712422912 is an frugal number, since it uses more digits than its factorization.

78712422912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290 (or 4138 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The spelling of 78712422912 in words is "seventy-eight billion, seven hundred twelve million, four hundred twenty-two thousand, nine hundred twelve".