99770272089049 has 9 divisors (see below), whose sum is σ = 99891750069631. Its totient is φ = 99648941694520.

The previous prime is 99770272089011. The next prime is 99770272089073. The reversal of 99770272089049 is 94098027207799.

The square root of 99770272089049 is 9988507.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 98886258440649 + 884013648400 = 9944157^2 + 940220^2 .

It is not a de Polignac number, because 99770272089049 - 2⁹ = 99770272088537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99770272089149) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8859800079 + ... + 8859811339.

Almost surely, 2^{99770272089049} is an apocalyptic number.

99770272089049 is the 9988507-th square number.

99770272089049 is the 4994254-th centered octagonal number.

It is an amenable number.

99770272089049 is a deficient number, since it is larger than the sum of its proper divisors (121477980582).

99770272089049 is an frugal number, since it uses more digits than its factorization.

99770272089049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24296 (or 12148 counting only the distinct ones).

The product of its (nonzero) digits is 288054144, while the sum is 73.

The spelling of 99770272089049 in words is "ninety-nine trillion, seven hundred seventy billion, two hundred seventy-two million, eighty-nine thousand, forty-nine".