72787884170 has 16 divisors (see below), whose sum is σ = 131505252840. Its totient is φ = 29006917824.

The previous prime is 72787884167. The next prime is 72787884179. The reversal of 72787884170 is 7148878727.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60158844529 + 12629039641 = 245273^2 + 112379^2 .

It is not an unprimeable number, because it can be changed into a prime (72787884179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13526657 + ... + 13532036.

Almost surely, 2^72787884170 is an apocalyptic number.

72787884170 is a deficient number, since it is larger than the sum of its proper divisors (58717368670).

72787884170 is a wasteful number, since it uses less digits than its factorization.

72787884170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27058969.

The product of its (nonzero) digits is 9834496, while the sum is 59.

The spelling of 72787884170 in words is "seventy-two billion, seven hundred eighty-seven million, eight hundred eighty-four thousand, one hundred seventy".