981991702902 has 24 divisors (see below), whose sum is σ = 2284633758456. Its totient is φ = 280569057888.

The previous prime is 981991702849. The next prime is 981991702907. The reversal of 981991702902 is 209207199189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981991702907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1670053623 + ... + 1670054210.

It is an arithmetic number, because the mean of its divisors is an integer number (95193073269).

Almost surely, 2^981991702902 is an apocalyptic number.

981991702902 is an abundant number, since it is smaller than the sum of its proper divisors (1302642055554).

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

981991702902 is a wasteful number, since it uses less digits than its factorization.

981991702902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340107852 (or 3340107845 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 57.

The spelling of 981991702902 in words is "nine hundred eighty-one billion, nine hundred ninety-one million, seven hundred two thousand, nine hundred two".