99615128 has 16 divisors (see below), whose sum is σ = 189945000. Its totient is φ = 48963136.

The previous prime is 99615083. The next prime is 99615161. The reversal of 99615128 is 82151699.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105053 + ... + 105996.

Almost surely, 2^99615128 is an apocalyptic number.

It is an amenable number.

99615128 is a deficient number, since it is larger than the sum of its proper divisors (90329872).

99615128 is a wasteful number, since it uses less digits than its factorization.

99615128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211114 (or 211110 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The square root of 99615128 is about 9980.7378484759. The cubic root of 99615128 is about 463.5626452621.

The spelling of 99615128 in words is "ninety-nine million, six hundred fifteen thousand, one hundred twenty-eight".