630687919571 has 2 divisors, whose sum is σ = 630687919572. Its totient is φ = 630687919570.

The previous prime is 630687919553. The next prime is 630687919709. The reversal of 630687919571 is 175919786036.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630687919571 is a prime.

It is not a weakly prime, because it can be changed into another prime (630687919531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315343959785 + 315343959786.

It is an arithmetic number, because the mean of its divisors is an integer number (315343959786).

Almost surely, 2^630687919571 is an apocalyptic number.

630687919571 is a deficient number, since it is larger than the sum of its proper divisors (1).

630687919571 is an equidigital number, since it uses as much as digits as its factorization.

630687919571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 630687919571 in words is "six hundred thirty billion, six hundred eighty-seven million, nine hundred nineteen thousand, five hundred seventy-one".