72940645522 has 12 divisors (see below), whose sum is σ = 114374794590. Its totient is φ = 34884656048.

The previous prime is 72940645501. The next prime is 72940645537. The reversal of 72940645522 is 22554604927.

It can be written as a sum of positive squares in only one way, i.e., 65920049001 + 7020596521 = 256749^2 + 83789^2 .

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34469947 + ... + 34472062.

Almost surely, 2^72940645522 is an apocalyptic number.

72940645522 is a deficient number, since it is larger than the sum of its proper divisors (41434149068).

72940645522 is a wasteful number, since it uses less digits than its factorization.

72940645522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68942057 (or 68942034 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 72940645522 in words is "seventy-two billion, nine hundred forty million, six hundred forty-five thousand, five hundred twenty-two".