72397149440 has 144 divisors (see below), whose sum is σ = 216204508800. Its totient is φ = 22565314560.

The previous prime is 72397149401. The next prime is 72397149443. The reversal of 72397149440 is 4494179327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72397149443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268715 + ... + 465834.

It is an arithmetic number, because the mean of its divisors is an integer number (1501420200).

Almost surely, 2^72397149440 is an apocalyptic number.

72397149440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72397149440 is an abundant number, since it is smaller than the sum of its proper divisors (143807359360).

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

72397149440 is a wasteful number, since it uses less digits than its factorization.

72397149440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734588 (or 734574 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 72397149440 in words is "seventy-two billion, three hundred ninety-seven million, one hundred forty-nine thousand, four hundred forty".