977981594408 has 512 divisors, whose sum is σ = 2462830755840. Its totient is φ = 353809244160.

The previous prime is 977981594327. The next prime is 977981594413. The reversal of 977981594408 is 804495189779.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7138551716 + ... + 7138551852.

It is an arithmetic number, because the mean of its divisors is an integer number (4810216320).

Almost surely, 2^977981594408 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 977981594408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231415377920).

977981594408 is an abundant number, since it is smaller than the sum of its proper divisors (1484849161432).

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

977981594408 is a wasteful number, since it uses less digits than its factorization.

977981594408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 71.

The spelling of 977981594408 in words is "nine hundred seventy-seven billion, nine hundred eighty-one million, five hundred ninety-four thousand, four hundred eight".