634863442699 has 2 divisors, whose sum is σ = 634863442700. Its totient is φ = 634863442698.

The previous prime is 634863442663. The next prime is 634863442723. The reversal of 634863442699 is 996244368436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634863442699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634863442699.

It is not a weakly prime, because it can be changed into another prime (634893442699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317431721349 + 317431721350.

It is an arithmetic number, because the mean of its divisors is an integer number (317431721350).

Almost surely, 2^634863442699 is an apocalyptic number.

634863442699 is a deficient number, since it is larger than the sum of its proper divisors (1).

634863442699 is an equidigital number, since it uses as much as digits as its factorization.

634863442699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161243136, while the sum is 64.

The spelling of 634863442699 in words is "six hundred thirty-four billion, eight hundred sixty-three million, four hundred forty-two thousand, six hundred ninety-nine".