79217865072 has 60 divisors (see below), whose sum is σ = 234741180960. Its totient is φ = 24852662784.

The previous prime is 79217865029. The next prime is 79217865079. The reversal of 79217865072 is 27056871297.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79217865079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16177672 + ... + 16182567.

It is an arithmetic number, because the mean of its divisors is an integer number (3912353016).

Almost surely, 2^79217865072 is an apocalyptic number.

79217865072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

79217865072 is an abundant number, since it is smaller than the sum of its proper divisors (155523315888).

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

79217865072 is a wasteful number, since it uses less digits than its factorization.

79217865072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32360270 (or 32360261 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 79217865072 in words is "seventy-nine billion, two hundred seventeen million, eight hundred sixty-five thousand, seventy-two".