978333961540 has 192 divisors, whose sum is σ = 2346210091008. Its totient is φ = 340178227200.

The previous prime is 978333961487. The next prime is 978333961589. The reversal of 978333961540 is 45169333879.

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, 50081575 + ... + 50101105.

It is an arithmetic number, because the mean of its divisors is an integer number (12219844224).

Almost surely, 2^978333961540 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 978333961540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173105045504).

978333961540 is an abundant number, since it is smaller than the sum of its proper divisors (1367876129468).

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

978333961540 is a wasteful number, since it uses less digits than its factorization.

978333961540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19758 (or 19756 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 58.

The spelling of 978333961540 in words is "nine hundred seventy-eight billion, three hundred thirty-three million, nine hundred sixty-one thousand, five hundred forty".