6749892161 has 2 divisors, whose sum is σ = 6749892162. Its totient is φ = 6749892160.

The previous prime is 6749892157. The next prime is 6749892181. The reversal of 6749892161 is 1612989476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4754929936 + 1994962225 = 68956^2 + 44665^2 .

It is a cyclic number.

It is not a de Polignac number, because 6749892161 - 2² = 6749892157 is a prime.

It is a super-2 number, since 2×6749892161² = 91122088370258499842, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (6749892151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374946080 + 3374946081.

It is an arithmetic number, because the mean of its divisors is an integer number (3374946081).

Almost surely, 2^6749892161 is an apocalyptic number.

It is an amenable number.

6749892161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6749892161 is an equidigital number, since it uses as much as digits as its factorization.

6749892161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 6749892161 is about 82157.7273358995. The cubic root of 6749892161 is about 1889.8715104460.

The spelling of 6749892161 in words is "six billion, seven hundred forty-nine million, eight hundred ninety-two thousand, one hundred sixty-one".