99999990000001 has 48 divisors (see below), whose sum is σ = 126308357253120. Its totient is φ = 78468509306880.

The previous prime is 99999989999983. The next prime is 99999990000107. The reversal of 99999990000001 is 10000009999999.

It is not a de Polignac number, because 99999990000001 - 2¹¹ = 99999989997953 is a prime.

It is the 10000000-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (99999990000901) by changing a digit.

It is a nontrivial repunit in base 9999999.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217307566 + ... + 217767256.

It is an arithmetic number, because the mean of its divisors is an integer number (2631424109440).

Almost surely, 2^{99999990000001} is an apocalyptic number.

99999990000001 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99999990000001 is a deficient number, since it is larger than the sum of its proper divisors (26308367253119).

99999990000001 is a wasteful number, since it uses less digits than its factorization.

99999990000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462534 (or 462527 counting only the distinct ones).

The product of its (nonzero) digits is 4782969, while the sum is 64.

The spelling of 99999990000001 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety million, one", and thus it is an aban number.