99497520728 has 16 divisors (see below), whose sum is σ = 189113439480. Its totient is φ = 49067270208.

The previous prime is 99497520721. The next prime is 99497520803. The reversal of 99497520728 is 82702579499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99497520721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85185650 + ... + 85186817.

Almost surely, 2^99497520728 is an apocalyptic number.

It is an amenable number.

99497520728 is a deficient number, since it is larger than the sum of its proper divisors (89615918752).

99497520728 is a wasteful number, since it uses less digits than its factorization.

99497520728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170372546 (or 170372542 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 99497520728 in words is "ninety-nine billion, four hundred ninety-seven million, five hundred twenty thousand, seven hundred twenty-eight".