777996613680 has 960 divisors, whose sum is σ = 2944431544320. Its totient is φ = 168718049280.

The previous prime is 777996613657. The next prime is 777996613699. The reversal of 777996613680 is 86316699777.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2892180586 + ... + 2892180854.

It is an arithmetic number, because the mean of its divisors is an integer number (3067116192).

Almost surely, 2^777996613680 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 777996613680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472215772160).

777996613680 is an abundant number, since it is smaller than the sum of its proper divisors (2166434930640).

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

777996613680 is a wasteful number, since it uses less digits than its factorization.

777996613680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 144027072, while the sum is 69.

The spelling of 777996613680 in words is "seven hundred seventy-seven billion, nine hundred ninety-six million, six hundred thirteen thousand, six hundred eighty".