99108012825 has 18 divisors (see below), whose sum is σ = 177513463374. Its totient is φ = 52857606720.

The previous prime is 99108012797. The next prime is 99108012847. The reversal of 99108012825 is 52821080199.

It can be written as a sum of positive squares in 3 ways, for example, as 10948901769 + 88159111056 = 104637^2 + 296916^2 .

It is not a de Polignac number, because 99108012825 - 2⁶ = 99108012761 is a prime.

It is a super-2 number, since 2×99108012825² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 220239804 + ... + 220240253.

Almost surely, 2^99108012825 is an apocalyptic number.

It is an amenable number.

99108012825 is a deficient number, since it is larger than the sum of its proper divisors (78405450549).

99108012825 is a wasteful number, since it uses less digits than its factorization.

99108012825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440480073 (or 440480065 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 99108012825 in words is "ninety-nine billion, one hundred eight million, twelve thousand, eight hundred twenty-five".