63815947201 has 2 divisors, whose sum is σ = 63815947202. Its totient is φ = 63815947200.

The previous prime is 63815947127. The next prime is 63815947207. The reversal of 63815947201 is 10274951836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63295012225 + 520934976 = 251585^2 + 22824^2 .

It is a cyclic number.

It is not a de Polignac number, because 63815947201 - 2⁷ = 63815947073 is a prime.

It is not a weakly prime, because it can be changed into another prime (63815947207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31907973600 + 31907973601.

It is an arithmetic number, because the mean of its divisors is an integer number (31907973601).

It is a 1-persistent number, because it is pandigital, but 2⋅63815947201 = 127631894402 is not.

Almost surely, 2^63815947201 is an apocalyptic number.

It is an amenable number.

63815947201 is a deficient number, since it is larger than the sum of its proper divisors (1).

63815947201 is an equidigital number, since it uses as much as digits as its factorization.

63815947201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 63815947201 in words is "sixty-three billion, eight hundred fifteen million, nine hundred forty-seven thousand, two hundred one".