72648439722 has 24 divisors (see below), whose sum is σ = 164248647264. Its totient is φ = 23163270504.

The previous prime is 72648439709. The next prime is 72648439741. The reversal of 72648439722 is 22793484627.

72648439722 is a `hidden beast` number, since 72 + 6 + 484 + 3 + 97 + 2 + 2 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87739248 + ... + 87740075.

It is an arithmetic number, because the mean of its divisors is an integer number (6843693636).

Almost surely, 2^72648439722 is an apocalyptic number.

72648439722 is an abundant number, since it is smaller than the sum of its proper divisors (91600207542).

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

72648439722 is a wasteful number, since it uses less digits than its factorization.

72648439722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175479354 (or 175479351 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 72648439722 in words is "seventy-two billion, six hundred forty-eight million, four hundred thirty-nine thousand, seven hundred twenty-two".