63618220651 has 2 divisors, whose sum is σ = 63618220652. Its totient is φ = 63618220650.

The previous prime is 63618220609. The next prime is 63618220681. The reversal of 63618220651 is 15602281636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63618220651 - 2⁹ = 63618220139 is a prime.

It is not a weakly prime, because it can be changed into another prime (63618220681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31809110325 + 31809110326.

It is an arithmetic number, because the mean of its divisors is an integer number (31809110326).

Almost surely, 2^63618220651 is an apocalyptic number.

63618220651 is a deficient number, since it is larger than the sum of its proper divisors (1).

63618220651 is an equidigital number, since it uses as much as digits as its factorization.

63618220651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 63618220651 in words is "sixty-three billion, six hundred eighteen million, two hundred twenty thousand, six hundred fifty-one".