978141991464 has 96 divisors (see below), whose sum is σ = 2891412482400. Its totient is φ = 296258202240.

The previous prime is 978141991427. The next prime is 978141991501. The reversal of 978141991464 is 464199141879.

978141991464 is a `hidden beast` number, since 9 + 7 + 81 + 4 + 1 + 9 + 91 + 464 = 666.

It is an interprime number because it is at equal distance from previous prime (978141991427) and next prime (978141991501).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1278082 + ... + 1894670.

It is an arithmetic number, because the mean of its divisors is an integer number (30118880025).

Almost surely, 2^978141991464 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 978141991464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1445706241200).

978141991464 is an abundant number, since it is smaller than the sum of its proper divisors (1913270490936).

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

978141991464 is a wasteful number, since it uses less digits than its factorization.

978141991464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618615 (or 618608 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 978141991464 in words is "nine hundred seventy-eight billion, one hundred forty-one million, nine hundred ninety-one thousand, four hundred sixty-four".