72340557240 has 64 divisors (see below), whose sum is σ = 248024770560. Its totient is φ = 16534984320.

The previous prime is 72340557227. The next prime is 72340557251. The reversal of 72340557240 is 4275504327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43059016 + ... + 43060695.

It is an arithmetic number, because the mean of its divisors is an integer number (3875387040).

Almost surely, 2^72340557240 is an apocalyptic number.

72340557240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72340557240 is an abundant number, since it is smaller than the sum of its proper divisors (175684213320).

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

72340557240 is a wasteful number, since it uses less digits than its factorization.

72340557240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86119732 (or 86119728 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 39.

The spelling of 72340557240 in words is "seventy-two billion, three hundred forty million, five hundred fifty-seven thousand, two hundred forty".