99989999999938 has 8 divisors (see below), whose sum is σ = 149985043672140. Its totient is φ = 49994985442560.

The previous prime is 99989999999927. The next prime is 99989999999941. The reversal of 99989999999938 is 83999999998999.

It can be written as a sum of positive squares in 2 ways, for example, as 99550965215529 + 439034784409 = 9977523^2 + 662597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 6599098 + ... + 15605386.

Almost surely, 2^{99989999999938} is an apocalyptic number.

99989999999938 is a deficient number, since it is larger than the sum of its proper divisors (49995043672202).

99989999999938 is a wasteful number, since it uses less digits than its factorization.

99989999999938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557412.

The product of its digits is 6025163444928, while the sum is 118.

The spelling of 99989999999938 in words is "ninety-nine trillion, nine hundred eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-eight".