63806380961 has 2 divisors, whose sum is σ = 63806380962. Its totient is φ = 63806380960.

The previous prime is 63806380933. The next prime is 63806380997. The reversal of 63806380961 is 16908360836.

63806380961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63705760000 + 100620961 = 252400^2 + 10031^2 .

It is a cyclic number.

It is not a de Polignac number, because 63806380961 - 2³⁴ = 46626511777 is a prime.

It is not a weakly prime, because it can be changed into another prime (63806380921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31903190480 + 31903190481.

It is an arithmetic number, because the mean of its divisors is an integer number (31903190481).

Almost surely, 2^63806380961 is an apocalyptic number.

It is an amenable number.

63806380961 is a deficient number, since it is larger than the sum of its proper divisors (1).

63806380961 is an equidigital number, since it uses as much as digits as its factorization.

63806380961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 63806380961 in words is "sixty-three billion, eight hundred six million, three hundred eighty thousand, nine hundred sixty-one".