72273909320 has 64 divisors (see below), whose sum is σ = 164273840640. Its totient is φ = 28615161600.

The previous prime is 72273909317. The next prime is 72273909329. The reversal of 72273909320 is 2390937227.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (72273909329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15740225 + ... + 15744815.

It is an arithmetic number, because the mean of its divisors is an integer number (2566778760).

Almost surely, 2^72273909320 is an apocalyptic number.

It is an amenable number.

72273909320 is an abundant number, since it is smaller than the sum of its proper divisors (91999931320).

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

72273909320 is a wasteful number, since it uses less digits than its factorization.

72273909320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8526 (or 8522 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 44.

The spelling of 72273909320 in words is "seventy-two billion, two hundred seventy-three million, nine hundred nine thousand, three hundred twenty".