72685489420 has 24 divisors (see below), whose sum is σ = 152950423248. Its totient is φ = 29014977600.

The previous prime is 72685489399. The next prime is 72685489421. The reversal of 72685489420 is 2498458627.

It is not an unprimeable number, because it can be changed into a prime (72685489421) 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, 3691071 + ... + 3710710.

It is an arithmetic number, because the mean of its divisors is an integer number (6372934302).

Almost surely, 2^72685489420 is an apocalyptic number.

It is an amenable number.

72685489420 is an abundant number, since it is smaller than the sum of its proper divisors (80264933828).

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

72685489420 is a wasteful number, since it uses less digits than its factorization.

72685489420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7402281 (or 7402279 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 72685489420 in words is "seventy-two billion, six hundred eighty-five million, four hundred eighty-nine thousand, four hundred twenty".