72249231380 has 24 divisors (see below), whose sum is σ = 151732449960. Its totient is φ = 28897966080.

The previous prime is 72249231371. The next prime is 72249231421. The reversal of 72249231380 is 8313294227.

It can be written as a sum of positive squares in 4 ways, for example, as 12933603076 + 59315628304 = 113726^2 + 243548^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267020 + ... + 464540.

It is an arithmetic number, because the mean of its divisors is an integer number (6322185415).

Almost surely, 2^72249231380 is an apocalyptic number.

It is an amenable number.

72249231380 is an abundant number, since it is smaller than the sum of its proper divisors (79483218580).

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

72249231380 is a wasteful number, since it uses less digits than its factorization.

72249231380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215819 (or 215817 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 72249231380 in words is "seventy-two billion, two hundred forty-nine million, two hundred thirty-one thousand, three hundred eighty".