77964847560 has 96 divisors (see below), whose sum is σ = 253708640640. Its totient is φ = 20764132992.

The previous prime is 77964847523. The next prime is 77964847577. The reversal of 77964847560 is 6574846977.

77964847560 is a `hidden beast` number, since 7 + 7 + 9 + 64 + 8 + 4 + 7 + 560 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145729 + ... + 420911.

It is an arithmetic number, because the mean of its divisors is an integer number (2642798340).

Almost surely, 2^77964847560 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 77964847560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126854320320).

77964847560 is an abundant number, since it is smaller than the sum of its proper divisors (175743793080).

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

77964847560 is a wasteful number, since it uses less digits than its factorization.

77964847560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275987 (or 275980 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 77964847560 in words is "seventy-seven billion, nine hundred sixty-four million, eight hundred forty-seven thousand, five hundred sixty".