6777962155891 has 2 divisors, whose sum is σ = 6777962155892. Its totient is φ = 6777962155890.

The previous prime is 6777962155849. The next prime is 6777962155967. The reversal of 6777962155891 is 1985512697776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6777962155891 - 2¹¹ = 6777962153843 is a prime.

It is not a weakly prime, because it can be changed into another prime (6777962105891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388981077945 + 3388981077946.

It is an arithmetic number, because the mean of its divisors is an integer number (3388981077946).

Almost surely, 2^{6777962155891} is an apocalyptic number.

6777962155891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777962155891 is an equidigital number, since it uses as much as digits as its factorization.

6777962155891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400075200, while the sum is 73.

The spelling of 6777962155891 in words is "six trillion, seven hundred seventy-seven billion, nine hundred sixty-two million, one hundred fifty-five thousand, eight hundred ninety-one".