99989700265225 has 81 divisors (see below), whose sum is σ = 134625358195797. Its totient is φ = 73655086567680.

The previous prime is 99989700265207. The next prime is 99989700265253. The reversal of 99989700265225 is 52256200798999.

The square root of 99989700265225 is 9999485.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2338859424889 + 97650840840336 = 1529333^2 + 9881844^2 .

It is not a de Polignac number, because 99989700265225 - 2²⁹ = 99989163394313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 39947941324 + ... + 39947943826.

Almost surely, 2^{99989700265225} is an apocalyptic number.

99989700265225 is the 9999485-th square number.

99989700265225 is the 4999743-rd centered octagonal number.

It is an amenable number.

99989700265225 is a deficient number, since it is larger than the sum of its proper divisors (34635657930572).

99989700265225 is an frugal number, since it uses more digits than its factorization.

99989700265225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 440899200, while the sum is 73.

The spelling of 99989700265225 in words is "ninety-nine trillion, nine hundred eighty-nine billion, seven hundred million, two hundred sixty-five thousand, two hundred twenty-five".