6800565157 has 2 divisors, whose sum is σ = 6800565158. Its totient is φ = 6800565156.

The previous prime is 6800565127. The next prime is 6800565241. The reversal of 6800565157 is 7515650086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6776417761 + 24147396 = 82319^2 + 4914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6800565157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6800565127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3400282578 + 3400282579.

It is an arithmetic number, because the mean of its divisors is an integer number (3400282579).

Almost surely, 2^6800565157 is an apocalyptic number.

It is an amenable number.

6800565157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6800565157 is an equidigital number, since it uses as much as digits as its factorization.

6800565157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 6800565157 is about 82465.5392088113. The cubic root of 6800565157 is about 1894.5889587291.

The spelling of 6800565157 in words is "six billion, eight hundred million, five hundred sixty-five thousand, one hundred fifty-seven".