981794893954904 has 16 divisors (see below), whose sum is σ = 1841178445370520. Its totient is φ = 490813975189440.

The previous prime is 981794893954873. The next prime is 981794893954921. The reversal of 981794893954904 is 409459398497189.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 981794893954904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10433923514 + ... + 10434017609.

Almost surely, 2^{981794893954904} is an apocalyptic number.

It is an amenable number.

981794893954904 is a deficient number, since it is larger than the sum of its proper divisors (859383551415616).

981794893954904 is a wasteful number, since it uses less digits than its factorization.

981794893954904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20867947010 (or 20867947006 counting only the distinct ones).

The product of its (nonzero) digits is 25395793920, while the sum is 89.

The spelling of 981794893954904 in words is "nine hundred eighty-one trillion, seven hundred ninety-four billion, eight hundred ninety-three million, nine hundred fifty-four thousand, nine hundred four".