6157657691 has 2 divisors, whose sum is σ = 6157657692. Its totient is φ = 6157657690.

The previous prime is 6157657657. The next prime is 6157657699. The reversal of 6157657691 is 1967567516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6157657691 - 2¹⁸ = 6157395547 is a prime.

It is not a weakly prime, because it can be changed into another prime (6157657699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078828845 + 3078828846.

It is an arithmetic number, because the mean of its divisors is an integer number (3078828846).

Almost surely, 2^6157657691 is an apocalyptic number.

6157657691 is a deficient number, since it is larger than the sum of its proper divisors (1).

6157657691 is an equidigital number, since it uses as much as digits as its factorization.

6157657691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 6157657691 is about 78470.7441725896. The cubic root of 6157657691 is about 1832.8989150943.

The spelling of 6157657691 in words is "six billion, one hundred fifty-seven million, six hundred fifty-seven thousand, six hundred ninety-one".