63625383240491 has 2 divisors, whose sum is σ = 63625383240492. Its totient is φ = 63625383240490.

The previous prime is 63625383240479. The next prime is 63625383240569. The reversal of 63625383240491 is 19404238352636.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63625383240491 - 2³⁸ = 63350505333547 is a prime.

It is not a weakly prime, because it can be changed into another prime (63625383248491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31812691620245 + 31812691620246.

It is an arithmetic number, because the mean of its divisors is an integer number (31812691620246).

Almost surely, 2^{63625383240491} is an apocalyptic number.

63625383240491 is a deficient number, since it is larger than the sum of its proper divisors (1).

63625383240491 is an equidigital number, since it uses as much as digits as its factorization.

63625383240491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22394880, while the sum is 56.

The spelling of 63625383240491 in words is "sixty-three trillion, six hundred twenty-five billion, three hundred eighty-three million, two hundred forty thousand, four hundred ninety-one".