72720147630 has 32 divisors (see below), whose sum is σ = 187953613344. Its totient is φ = 17900343936.

The previous prime is 72720147623. The next prime is 72720147677. The reversal of 72720147630 is 3674102727.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

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, 93230569 + ... + 93231348.

It is an arithmetic number, because the mean of its divisors is an integer number (5873550417).

Almost surely, 2^72720147630 is an apocalyptic number.

72720147630 is an abundant number, since it is smaller than the sum of its proper divisors (115233465714).

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

72720147630 is a wasteful number, since it uses less digits than its factorization.

72720147630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186461940.

The product of its (nonzero) digits is 98784, while the sum is 39.

The spelling of 72720147630 in words is "seventy-two billion, seven hundred twenty million, one hundred forty-seven thousand, six hundred thirty".