72091957240 has 32 divisors (see below), whose sum is σ = 167800248000. Its totient is φ = 27842410624.

The previous prime is 72091957219. The next prime is 72091957243. The reversal of 72091957240 is 4275919027.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72091957243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31072960 + ... + 31075279.

It is an arithmetic number, because the mean of its divisors is an integer number (5243757750).

Almost surely, 2^72091957240 is an apocalyptic number.

It is an amenable number.

72091957240 is an abundant number, since it is smaller than the sum of its proper divisors (95708290760).

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

72091957240 is a wasteful number, since it uses less digits than its factorization.

72091957240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62148279 (or 62148275 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 72091957240 in words is "seventy-two billion, ninety-one million, nine hundred fifty-seven thousand, two hundred forty".