72672571816 has 16 divisors (see below), whose sum is σ = 146742693300. Its totient is φ = 33541186944.

The previous prime is 72672571799. The next prime is 72672571823. The reversal of 72672571816 is 61817527627.

It can be written as a sum of positive squares in 2 ways, for example, as 67940507716 + 4732064100 = 260654^2 + 68790^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349387261 + ... + 349387468.

Almost surely, 2^72672571816 is an apocalyptic number.

It is an amenable number.

72672571816 is an abundant number, since it is smaller than the sum of its proper divisors (74070121484).

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

72672571816 is a wasteful number, since it uses less digits than its factorization.

72672571816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698774748 (or 698774744 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 52.

The spelling of 72672571816 in words is "seventy-two billion, six hundred seventy-two million, five hundred seventy-one thousand, eight hundred sixteen".