196989789870 has 24 divisors (see below), whose sum is σ = 512173453896. Its totient is φ = 52530610608.

The previous prime is 196989789851. The next prime is 196989789937. The reversal of 196989789870 is 78987989691.

It is a self number, because there is not a number n which added to its sum of digits gives 196989789870.

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, 1094387632 + ... + 1094387811.

It is an arithmetic number, because the mean of its divisors is an integer number (21340560579).

Almost surely, 2^196989789870 is an apocalyptic number.

196989789870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196989789870 is an abundant number, since it is smaller than the sum of its proper divisors (315183664026).

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

196989789870 is a wasteful number, since it uses less digits than its factorization.

196989789870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188775456 (or 2188775453 counting only the distinct ones).

The product of its (nonzero) digits is 987614208, while the sum is 81.

The spelling of 196989789870 in words is "one hundred ninety-six billion, nine hundred eighty-nine million, seven hundred eighty-nine thousand, eight hundred seventy".