981831993356 has 24 divisors (see below), whose sum is σ = 1735112632176. Its totient is φ = 486109149120.

The previous prime is 981831993347. The next prime is 981831993367. The reversal of 981831993356 is 653399138189.

It is a junction number, because it is equal to n+sod(n) for n = 981831993292 and 981831993301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2786291 + ... + 3118826.

It is an arithmetic number, because the mean of its divisors is an integer number (72296359674).

Almost surely, 2^981831993356 is an apocalyptic number.

It is an amenable number.

981831993356 is a deficient number, since it is larger than the sum of its proper divisors (753280638820).

981831993356 is a wasteful number, since it uses less digits than its factorization.

981831993356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905529 (or 5905527 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 65.

The spelling of 981831993356 in words is "nine hundred eighty-one billion, eight hundred thirty-one million, nine hundred ninety-three thousand, three hundred fifty-six".