768436651 has 2 divisors, whose sum is σ = 768436652. Its totient is φ = 768436650.

The previous prime is 768436579. The next prime is 768436661. The reversal of 768436651 is 156634867.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768436651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (768436661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384218325 + 384218326.

It is an arithmetic number, because the mean of its divisors is an integer number (384218326).

Almost surely, 2^768436651 is an apocalyptic number.

768436651 is a deficient number, since it is larger than the sum of its proper divisors (1).

768436651 is an equidigital number, since it uses as much as digits as its factorization.

768436651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The square root of 768436651 is about 27720.6899445162. The cubic root of 768436651 is about 915.9449169314.

The spelling of 768436651 in words is "seven hundred sixty-eight million, four hundred thirty-six thousand, six hundred fifty-one".