6493961651 has 2 divisors, whose sum is σ = 6493961652. Its totient is φ = 6493961650.

The previous prime is 6493961647. The next prime is 6493961671. The reversal of 6493961651 is 1561693946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6493961651 - 2² = 6493961647 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6493961651.

It is not a weakly prime, because it can be changed into another prime (6493961671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3246980825 + 3246980826.

It is an arithmetic number, because the mean of its divisors is an integer number (3246980826).

Almost surely, 2^6493961651 is an apocalyptic number.

6493961651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6493961651 is an equidigital number, since it uses as much as digits as its factorization.

6493961651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 6493961651 is about 80585.1205310261. The cubic root of 6493961651 is about 1865.6774966709.

The spelling of 6493961651 in words is "six billion, four hundred ninety-three million, nine hundred sixty-one thousand, six hundred fifty-one".