989999999970 has 64 divisors (see below), whose sum is σ = 2452831911936. Its totient is φ = 255464418240.

The previous prime is 989999999917. The next prime is 989999999981. The reversal of 989999999970 is 79999999989.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15300627 + ... + 15365193.

It is an arithmetic number, because the mean of its divisors is an integer number (38325498624).

Almost surely, 2^989999999970 is an apocalyptic number.

989999999970 is an abundant number, since it is smaller than the sum of its proper divisors (1462831911966).

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

989999999970 is a wasteful number, since it uses less digits than its factorization.

989999999970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81095.

The product of its (nonzero) digits is 21695547384, while the sum is 96.

The spelling of 989999999970 in words is "nine hundred eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy".