99185716225 has 12 divisors (see below), whose sum is σ = 122994275184. Its totient is φ = 79346000720.

The previous prime is 99185716211. The next prime is 99185716237. The reversal of 99185716225 is 52261758199.

It is not a de Polignac number, because 99185716225 - 2¹³ = 99185708033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1245042 + ... + 1322308.

It is an arithmetic number, because the mean of its divisors is an integer number (10249522932).

Almost surely, 2^99185716225 is an apocalyptic number.

It is an amenable number.

99185716225 is a deficient number, since it is larger than the sum of its proper divisors (23808558959).

99185716225 is a wasteful number, since it uses less digits than its factorization.

99185716225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128624 (or 128619 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 55.

The spelling of 99185716225 in words is "ninety-nine billion, one hundred eighty-five million, seven hundred sixteen thousand, two hundred twenty-five".