6777801577931 has 2 divisors, whose sum is σ = 6777801577932. Its totient is φ = 6777801577930.

The previous prime is 6777801577907. The next prime is 6777801578063. The reversal of 6777801577931 is 1397751087776.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6777801577931 is a prime.

It is a super-2 number, since 2×6777801577931² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6777801577031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388900788965 + 3388900788966.

It is an arithmetic number, because the mean of its divisors is an integer number (3388900788966).

Almost surely, 2^{6777801577931} is an apocalyptic number.

6777801577931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777801577931 is an equidigital number, since it uses as much as digits as its factorization.

6777801577931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108909360, while the sum is 68.

The spelling of 6777801577931 in words is "six trillion, seven hundred seventy-seven billion, eight hundred one million, five hundred seventy-seven thousand, nine hundred thirty-one".