9689981850 has 36 divisors (see below), whose sum is σ = 26033752446. Its totient is φ = 2583995040.

The previous prime is 9689981849. The next prime is 9689981881. The reversal of 9689981850 is 581899869.

It can be written as a sum of positive squares in 3 ways, for example, as 7318973601 + 2371008249 = 85551^2 + 48693^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10766197 + ... + 10767096.

Almost surely, 2^9689981850 is an apocalyptic number.

9689981850 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9689981850 is an abundant number, since it is smaller than the sum of its proper divisors (16343770596).

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

9689981850 is a wasteful number, since it uses less digits than its factorization.

9689981850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21533311 (or 21533303 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The square root of 9689981850 is about 98437.7054283571. The cubic root of 9689981850 is about 2131.9367757136.

The spelling of 9689981850 in words is "nine billion, six hundred eighty-nine million, nine hundred eighty-one thousand, eight hundred fifty".