77802741606560 has 48 divisors (see below), whose sum is σ = 183883184270856. Its totient is φ = 31108532456448.

The previous prime is 77802741606497. The next prime is 77802741606619. The reversal of 77802741606560 is 6560614720877.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70138548015376 + 7664193591184 = 8374876^2 + 2768428^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77802741606560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97760147 + ... + 98552786.

Almost surely, 2^{77802741606560} is an apocalyptic number.

It is an amenable number.

77802741606560 is an abundant number, since it is smaller than the sum of its proper divisors (106080442664296).

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

77802741606560 is a wasteful number, since it uses less digits than its factorization.

77802741606560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196315425 (or 196315417 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 77802741606560 in words is "seventy-seven trillion, eight hundred two billion, seven hundred forty-one million, six hundred six thousand, five hundred sixty".