981568911960 has 384 divisors, whose sum is σ = 3928998528000. Its totient is φ = 206956643328.

The previous prime is 981568911919. The next prime is 981568911989. The reversal of 981568911960 is 69119865189.

981568911960 is a `hidden beast` number, since 9 + 8 + 1 + 568 + 9 + 1 + 1 + 9 + 60 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 51063231 + ... + 51082449.

It is an arithmetic number, because the mean of its divisors is an integer number (10231767000).

Almost surely, 2^981568911960 is an apocalyptic number.

981568911960 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981568911960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964499264000).

981568911960 is an abundant number, since it is smaller than the sum of its proper divisors (2947429616040).

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

981568911960 is a wasteful number, since it uses less digits than its factorization.

981568911960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20815 (or 20808 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 63.

The spelling of 981568911960 in words is "nine hundred eighty-one billion, five hundred sixty-eight million, nine hundred eleven thousand, nine hundred sixty".