63440986799 has 2 divisors, whose sum is σ = 63440986800. Its totient is φ = 63440986798.

The previous prime is 63440986789. The next prime is 63440986811. The reversal of 63440986799 is 99768904436.

It is a happy number.

63440986799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63440986799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63440986789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720493399 + 31720493400.

It is an arithmetic number, because the mean of its divisors is an integer number (31720493400).

Almost surely, 2^63440986799 is an apocalyptic number.

63440986799 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440986799 is an equidigital number, since it uses as much as digits as its factorization.

63440986799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70543872, while the sum is 65.

The spelling of 63440986799 in words is "sixty-three billion, four hundred forty million, nine hundred eighty-six thousand, seven hundred ninety-nine".