63440618441 has 2 divisors, whose sum is σ = 63440618442. Its totient is φ = 63440618440.

The previous prime is 63440618413. The next prime is 63440618443. The reversal of 63440618441 is 14481604436.

63440618441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63272371600 + 168246841 = 251540^2 + 12971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63440618441 is a prime.

Together with 63440618443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63440618443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720309220 + 31720309221.

It is an arithmetic number, because the mean of its divisors is an integer number (31720309221).

Almost surely, 2^63440618441 is an apocalyptic number.

It is an amenable number.

63440618441 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440618441 is an equidigital number, since it uses as much as digits as its factorization.

63440618441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 63440618441 in words is "sixty-three billion, four hundred forty million, six hundred eighteen thousand, four hundred forty-one".