981234802125840 has 160 divisors (see below), whose sum is σ = 3046589883267840. Its totient is φ = 261253116444672.

The previous prime is 981234802125833. The next prime is 981234802125859. The reversal of 981234802125840 is 48521208432189.

981234802125840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 923689716 + ... + 924751404.

It is an arithmetic number, because the mean of its divisors is an integer number (19041186770424).

Almost surely, 2^{981234802125840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981234802125840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523294941633920).

981234802125840 is an abundant number, since it is smaller than the sum of its proper divisors (2065355081142000).

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

981234802125840 is a wasteful number, since it uses less digits than its factorization.

981234802125840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067729 (or 1067723 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 57.

The spelling of 981234802125840 in words is "nine hundred eighty-one trillion, two hundred thirty-four billion, eight hundred two million, one hundred twenty-five thousand, eight hundred forty".