72458239720 has 32 divisors (see below), whose sum is σ = 164995276320. Its totient is φ = 28634098240.

The previous prime is 72458239717. The next prime is 72458239723. The reversal of 72458239720 is 2793285427.

It is an interprime number because it is at equal distance from previous prime (72458239717) and next prime (72458239723).

It is not an unprimeable number, because it can be changed into a prime (72458239723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10909066 + ... + 10915705.

It is an arithmetic number, because the mean of its divisors is an integer number (5156102385).

Almost surely, 2^72458239720 is an apocalyptic number.

It is an amenable number.

72458239720 is an abundant number, since it is smaller than the sum of its proper divisors (92537036600).

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

72458239720 is a wasteful number, since it uses less digits than its factorization.

72458239720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21824865 (or 21824861 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 72458239720 in words is "seventy-two billion, four hundred fifty-eight million, two hundred thirty-nine thousand, seven hundred twenty".