6779368917520 has 80 divisors (see below), whose sum is σ = 16710228476928. Its totient is φ = 2553345538560.

The previous prime is 6779368917511. The next prime is 6779368917527. The reversal of 6779368917520 is 257198639776.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6779368917520.

It is not an unprimeable number, because it can be changed into a prime (6779368917527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36849004 + ... + 37032523.

Almost surely, 2^{6779368917520} is an apocalyptic number.

It is an amenable number.

6779368917520 is an abundant number, since it is smaller than the sum of its proper divisors (9930859559408).

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

6779368917520 is a wasteful number, since it uses less digits than its factorization.

6779368917520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73881608 (or 73881602 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 70.

The spelling of 6779368917520 in words is "six trillion, seven hundred seventy-nine billion, three hundred sixty-eight million, nine hundred seventeen thousand, five hundred twenty".