72730521100 has 18 divisors (see below), whose sum is σ = 157825231004. Its totient is φ = 29092208400.

The previous prime is 72730521089. The next prime is 72730521131. The reversal of 72730521100 is 112503727.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363652506 + ... + 363652705.

Almost surely, 2^72730521100 is an apocalyptic number.

It is an amenable number.

72730521100 is an abundant number, since it is smaller than the sum of its proper divisors (85094709904).

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

72730521100 is a wasteful number, since it uses less digits than its factorization.

72730521100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727305225 (or 727305218 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The spelling of 72730521100 in words is "seventy-two billion, seven hundred thirty million, five hundred twenty-one thousand, one hundred".