63974949851 has 2 divisors, whose sum is σ = 63974949852. Its totient is φ = 63974949850.

The previous prime is 63974949827. The next prime is 63974949859. The reversal of 63974949851 is 15894947936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63974949851 is a prime.

It is not a weakly prime, because it can be changed into another prime (63974949859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31987474925 + 31987474926.

It is an arithmetic number, because the mean of its divisors is an integer number (31987474926).

Almost surely, 2^63974949851 is an apocalyptic number.

63974949851 is a deficient number, since it is larger than the sum of its proper divisors (1).

63974949851 is an equidigital number, since it uses as much as digits as its factorization.

63974949851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 65.

The spelling of 63974949851 in words is "sixty-three billion, nine hundred seventy-four million, nine hundred forty-nine thousand, eight hundred fifty-one".