6811791261 has 16 divisors (see below), whose sum is σ = 9945745920. Its totient is φ = 4112655920.

The previous prime is 6811791253. The next prime is 6811791271. The reversal of 6811791261 is 1621971186.

It is a cyclic number.

It is not a de Polignac number, because 6811791261 - 2³ = 6811791253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811791211) 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, 383751 + ... + 401108.

It is an arithmetic number, because the mean of its divisors is an integer number (621609120).

Almost surely, 2^6811791261 is an apocalyptic number.

It is an amenable number.

6811791261 is a deficient number, since it is larger than the sum of its proper divisors (3133954659).

6811791261 is a wasteful number, since it uses less digits than its factorization.

6811791261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785136.

The product of its digits is 36288, while the sum is 42.

The square root of 6811791261 is about 82533.5765673583. The cubic root of 6811791261 is about 1895.6308897872.

The spelling of 6811791261 in words is "six billion, eight hundred eleven million, seven hundred ninety-one thousand, two hundred sixty-one".