63656401 has 2 divisors, whose sum is σ = 63656402. Its totient is φ = 63656400.

The previous prime is 63656323. The next prime is 63656419. The reversal of 63656401 is 10465636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 27836176 = 5985^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 63656401 - 2⁷ = 63656273 is a prime.

It is not a weakly prime, because it can be changed into another prime (63656431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31828200 + 31828201.

It is an arithmetic number, because the mean of its divisors is an integer number (31828201).

Almost surely, 2^63656401 is an apocalyptic number.

It is an amenable number.

63656401 is a deficient number, since it is larger than the sum of its proper divisors (1).

63656401 is an equidigital number, since it uses as much as digits as its factorization.

63656401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 63656401 is about 7978.4961615583. The cubic root of 63656401 is about 399.2828838795.

The spelling of 63656401 in words is "sixty-three million, six hundred fifty-six thousand, four hundred one".