977974782764 has 72 divisors (see below), whose sum is σ = 2015850654720. Its totient is φ = 413879448864.

The previous prime is 977974782761. The next prime is 977974782797. The reversal of 977974782764 is 467287479779.

It is not an unprimeable number, because it can be changed into a prime (977974782761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35889857 + ... + 35917095.

It is an arithmetic number, because the mean of its divisors is an integer number (27997925760).

Almost surely, 2^977974782764 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 977974782764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007925327360).

977974782764 is an abundant number, since it is smaller than the sum of its proper divisors (1037875871956).

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

977974782764 is a wasteful number, since it uses less digits than its factorization.

977974782764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29547 (or 29538 counting only the distinct ones).

The product of its digits is 2091059712, while the sum is 77.

The spelling of 977974782764 in words is "nine hundred seventy-seven billion, nine hundred seventy-four million, seven hundred eighty-two thousand, seven hundred sixty-four".