63648040639 has 2 divisors, whose sum is σ = 63648040640. Its totient is φ = 63648040638.

The previous prime is 63648040583. The next prime is 63648040727. The reversal of 63648040639 is 93604084636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63648040639 - 2¹¹ = 63648038591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63648040592 and 63648040601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63648046639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31824020319 + 31824020320.

It is an arithmetic number, because the mean of its divisors is an integer number (31824020320).

Almost surely, 2^63648040639 is an apocalyptic number.

63648040639 is a deficient number, since it is larger than the sum of its proper divisors (1).

63648040639 is an equidigital number, since it uses as much as digits as its factorization.

63648040639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 63648040639 in words is "sixty-three billion, six hundred forty-eight million, forty thousand, six hundred thirty-nine".