977178180882564 has 168 divisors, whose sum is σ = 2592919677872160. Its totient is φ = 322042398480000.

The previous prime is 977178180882481. The next prime is 977178180882571. The reversal of 977178180882564 is 465288081871779.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3698344419 + ... + 3698608629.

It is an arithmetic number, because the mean of its divisors is an integer number (15434045701620).

Almost surely, 2^{977178180882564} 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 977178180882564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296459838936080).

977178180882564 is an abundant number, since it is smaller than the sum of its proper divisors (1615741496989596).

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

977178180882564 is a wasteful number, since it uses less digits than its factorization.

977178180882564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278573 (or 278556 counting only the distinct ones).

The product of its (nonzero) digits is 3034644480, while the sum is 81.

The spelling of 977178180882564 in words is "nine hundred seventy-seven trillion, one hundred seventy-eight billion, one hundred eighty million, eight hundred eighty-two thousand, five hundred sixty-four".