72912170706 has 32 divisors (see below), whose sum is σ = 154442567808. Its totient is φ = 22868432640.

The previous prime is 72912170701. The next prime is 72912170713. The reversal of 72912170706 is 60707121927.

It is not an unprimeable number, because it can be changed into a prime (72912170701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307536 + ... + 490308.

It is an arithmetic number, because the mean of its divisors is an integer number (4826330244).

Almost surely, 2^72912170706 is an apocalyptic number.

72912170706 is an abundant number, since it is smaller than the sum of its proper divisors (81530397102).

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

72912170706 is a wasteful number, since it uses less digits than its factorization.

72912170706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186706.

The product of its (nonzero) digits is 74088, while the sum is 42.

The spelling of 72912170706 in words is "seventy-two billion, nine hundred twelve million, one hundred seventy thousand, seven hundred six".