977899557888 has 396 divisors, whose sum is σ = 3218747342720. Its totient is φ = 296324075520.

The previous prime is 977899557827. The next prime is 977899557907. The reversal of 977899557888 is 888755998779.

It is a tau number, because it is divible by the number of its divisors (396).

It is a super-3 number, since 3×977899557888³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 977899557798 and 977899557807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30092433 + ... + 30124911.

Almost surely, 2^977899557888 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 977899557888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609373671360).

977899557888 is an abundant number, since it is smaller than the sum of its proper divisors (2240847784832).

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

977899557888 is a wasteful number, since it uses less digits than its factorization.

977899557888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32536 (or 32495 counting only the distinct ones).

The product of its digits is 25604812800, while the sum is 90.

The spelling of 977899557888 in words is "nine hundred seventy-seven billion, eight hundred ninety-nine million, five hundred fifty-seven thousand, eight hundred eighty-eight".