99918988874 has 4 divisors (see below), whose sum is σ = 149878483314. Its totient is φ = 49959494436.

The previous prime is 99918988861. The next prime is 99918988891. The reversal of 99918988874 is 47888981999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75958116025 + 23960872849 = 275605^2 + 154793^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24979747217 + ... + 24979747220.

Almost surely, 2^99918988874 is an apocalyptic number.

99918988874 is a deficient number, since it is larger than the sum of its proper divisors (49959494440).

99918988874 is a wasteful number, since it uses less digits than its factorization.

99918988874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49959494439.

The product of its digits is 752467968, while the sum is 80.

The spelling of 99918988874 in words is "ninety-nine billion, nine hundred eighteen million, nine hundred eighty-eight thousand, eight hundred seventy-four".