63639400633 has 2 divisors, whose sum is σ = 63639400634. Its totient is φ = 63639400632.

The previous prime is 63639400613. The next prime is 63639400723. The reversal of 63639400633 is 33600493636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48605698089 + 15033702544 = 220467^2 + 122612^2 .

It is a cyclic number.

It is not a de Polignac number, because 63639400633 - 2³³ = 55049466041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63639400633.

It is not a weakly prime, because it can be changed into another prime (63639400613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31819700316 + 31819700317.

It is an arithmetic number, because the mean of its divisors is an integer number (31819700317).

Almost surely, 2^63639400633 is an apocalyptic number.

It is an amenable number.

63639400633 is a deficient number, since it is larger than the sum of its proper divisors (1).

63639400633 is an equidigital number, since it uses as much as digits as its factorization.

63639400633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 43.

The spelling of 63639400633 in words is "sixty-three billion, six hundred thirty-nine million, four hundred thousand, six hundred thirty-three".