981299264371944 has 256 divisors, whose sum is σ = 2896044659596800. Its totient is φ = 271284798799872.

The previous prime is 981299264371919. The next prime is 981299264371967. The reversal of 981299264371944 is 449173462992189.

981299264371944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 981299264371944.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6703294302 + ... + 6703440690.

It is an arithmetic number, because the mean of its divisors is an integer number (11312674451550).

Almost surely, 2^{981299264371944} 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 981299264371944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448022329798400).

981299264371944 is an abundant number, since it is smaller than the sum of its proper divisors (1914745395224856).

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

981299264371944 is a wasteful number, since it uses less digits than its factorization.

981299264371944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156844 (or 156840 counting only the distinct ones).

The product of its digits is 1693052928, while the sum is 78.

The spelling of 981299264371944 in words is "nine hundred eighty-one trillion, two hundred ninety-nine billion, two hundred sixty-four million, three hundred seventy-one thousand, nine hundred forty-four".