999997999900 has 36 divisors (see below), whose sum is σ = 2190276016488. Its totient is φ = 396260885440.

The previous prime is 999997999837. The next prime is 999997999919. The reversal of 999997999900 is 9999799999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46718179 + ... + 46739578.

It is an arithmetic number, because the mean of its divisors is an integer number (60841000458).

Almost surely, 2^999997999900 is an apocalyptic number.

It is an amenable number.

999997999900 is an abundant number, since it is smaller than the sum of its proper divisors (1190278016588).

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

999997999900 is a wasteful number, since it uses less digits than its factorization.

999997999900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93457878 (or 93457871 counting only the distinct ones).

The product of its (nonzero) digits is 2711943423, while the sum is 88.

It can be divided in two parts, 999 and 997999900, that added together give a palindrome (998000899).

The spelling of 999997999900 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred".