6129656811 has 6 divisors (see below), whose sum is σ = 8853948740. Its totient is φ = 4086437868.

The previous prime is 6129656807. The next prime is 6129656843. The reversal of 6129656811 is 1186569216.

6129656811 is a `hidden beast` number, since 61 + 29 + 6 + 568 + 1 + 1 = 666.

It is not a de Polignac number, because 6129656811 - 2² = 6129656807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6129656111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340536481 + ... + 340536498.

Almost surely, 2^6129656811 is an apocalyptic number.

6129656811 is a deficient number, since it is larger than the sum of its proper divisors (2724291929).

6129656811 is a wasteful number, since it uses less digits than its factorization.

6129656811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681072985 (or 681072982 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 6129656811 is about 78292.1248338554. The cubic root of 6129656811 is about 1830.1164299299.

The spelling of 6129656811 in words is "six billion, one hundred twenty-nine million, six hundred fifty-six thousand, eight hundred eleven".