77943644960 has 96 divisors (see below), whose sum is σ = 186279912000. Its totient is φ = 30816781312.

The previous prime is 77943644959. The next prime is 77943645023. The reversal of 77943644960 is 6944634977.

It is a self number, because there is not a number n which added to its sum of digits gives 77943644960.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7990166 + ... + 7999914.

It is an arithmetic number, because the mean of its divisors is an integer number (1940415750).

Almost surely, 2^77943644960 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 77943644960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93139956000).

77943644960 is an abundant number, since it is smaller than the sum of its proper divisors (108336267040).

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

77943644960 is a wasteful number, since it uses less digits than its factorization.

77943644960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 59.

The spelling of 77943644960 in words is "seventy-seven billion, nine hundred forty-three million, six hundred forty-four thousand, nine hundred sixty".