99900901000 has 64 divisors (see below), whose sum is σ = 234438750000. Its totient is φ = 39845721600.

The previous prime is 99900900997. The next prime is 99900901003. The reversal of 99900901000 is 10900999.

It is an interprime number because it is at equal distance from previous prime (99900900997) and next prime (99900901003).

It can be written as a sum of positive squares in 8 ways, for example, as 976812516 + 98924088484 = 31254^2 + 314522^2 .

It is a super-2 number, since 2×99900901000² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99900901003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205876 + ... + 492124.

Almost surely, 2^99900901000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99900901000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117219375000).

99900901000 is an abundant number, since it is smaller than the sum of its proper divisors (134537849000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99900901000 is a wasteful number, since it uses less digits than its factorization.

99900901000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286619 (or 286605 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 37.

The spelling of 99900901000 in words is "ninety-nine billion, nine hundred million, nine hundred one thousand".