777000720560 has 80 divisors (see below), whose sum is σ = 1841164300800. Its totient is φ = 304879964928.

The previous prime is 777000720533. The next prime is 777000720577. The reversal of 777000720560 is 65027000777.

It is a tau number, because it is divible by the number of its divisors (80).

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, 977771 + ... + 1584309.

It is an arithmetic number, because the mean of its divisors is an integer number (23014553760).

Almost surely, 2^777000720560 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 777000720560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920582150400).

777000720560 is an abundant number, since it is smaller than the sum of its proper divisors (1064163580240).

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

777000720560 is a wasteful number, since it uses less digits than its factorization.

777000720560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606858 (or 606852 counting only the distinct ones).

The product of its (nonzero) digits is 144060, while the sum is 41.

The spelling of 777000720560 in words is "seven hundred seventy-seven billion, seven hundred twenty thousand, five hundred sixty".