63316046921 has 2 divisors, whose sum is σ = 63316046922. Its totient is φ = 63316046920.

The previous prime is 63316046909. The next prime is 63316047077. The reversal of 63316046921 is 12964061336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40162164025 + 23153882896 = 200405^2 + 152164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63316046921 is a prime.

It is not a weakly prime, because it can be changed into another prime (63316046021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31658023460 + 31658023461.

It is an arithmetic number, because the mean of its divisors is an integer number (31658023461).

Almost surely, 2^63316046921 is an apocalyptic number.

It is an amenable number.

63316046921 is a deficient number, since it is larger than the sum of its proper divisors (1).

63316046921 is an equidigital number, since it uses as much as digits as its factorization.

63316046921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 63316046921 in words is "sixty-three billion, three hundred sixteen million, forty-six thousand, nine hundred twenty-one".