6778117723161 has 32 divisors (see below), whose sum is σ = 9109255541760. Its totient is φ = 4482989916224.

The previous prime is 6778117723127. The next prime is 6778117723193. The reversal of 6778117723161 is 1613277118776.

It is a cyclic number.

It is not a de Polignac number, because 6778117723161 - 2⁷ = 6778117723033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6778117713161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670896436 + ... + 670906538.

It is an arithmetic number, because the mean of its divisors is an integer number (284664235680).

Almost surely, 2^{6778117723161} is an apocalyptic number.

It is an amenable number.

6778117723161 is a deficient number, since it is larger than the sum of its proper divisors (2331137818599).

6778117723161 is a wasteful number, since it uses less digits than its factorization.

6778117723161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13085.

The product of its digits is 4148928, while the sum is 57.

The spelling of 6778117723161 in words is "six trillion, seven hundred seventy-eight billion, one hundred seventeen million, seven hundred twenty-three thousand, one hundred sixty-one".