99999700000 has 144 divisors (see below), whose sum is σ = 246588857928. Its totient is φ = 39916800000.

The previous prime is 99999699983. The next prime is 99999700027. The reversal of 99999700000 is 799999.

It can be written as a sum of positive squares in 12 ways, for example, as 17628403984 + 82371296016 = 132772^2 + 287004^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75699340 + ... + 75700660.

Almost surely, 2^99999700000 is an apocalyptic number.

99999700000 is the 200000-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123294428964).

99999700000 is an abundant number, since it is smaller than the sum of its proper divisors (146589157928).

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

99999700000 is an equidigital number, since it uses as much as digits as its factorization.

99999700000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 413343, while the sum is 52.

The spelling of 99999700000 in words is "ninety-nine billion, nine hundred ninety-nine million, seven hundred thousand".