72730521099 has 48 divisors (see below), whose sum is σ = 113451365664. Its totient is φ = 44727321600.

The previous prime is 72730521089. The next prime is 72730521131. The reversal of 72730521099 is 99012503727.

72730521099 is a `hidden beast` number, since 7 + 2 + 7 + 30 + 521 + 0 + 99 = 666.

It is not a de Polignac number, because 72730521099 - 2⁵ = 72730521067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72730521079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8842809 + ... + 8851029.

It is an arithmetic number, because the mean of its divisors is an integer number (2363570118).

Almost surely, 2^72730521099 is an apocalyptic number.

72730521099 is a deficient number, since it is larger than the sum of its proper divisors (40720844565).

72730521099 is a wasteful number, since it uses less digits than its factorization.

72730521099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9388 (or 9385 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 72730521099 in words is "seventy-two billion, seven hundred thirty million, five hundred twenty-one thousand, ninety-nine".