63406561919 has 2 divisors, whose sum is σ = 63406561920. Its totient is φ = 63406561918.

The previous prime is 63406561877. The next prime is 63406561961. The reversal of 63406561919 is 91916560436.

It is a balanced prime because it is at equal distance from previous prime (63406561877) and next prime (63406561961).

It is a cyclic number.

It is not a de Polignac number, because 63406561919 - 2⁸ = 63406561663 is a prime.

It is a super-2 number, since 2×63406561919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63406561979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31703280959 + 31703280960.

It is an arithmetic number, because the mean of its divisors is an integer number (31703280960).

Almost surely, 2^63406561919 is an apocalyptic number.

63406561919 is a deficient number, since it is larger than the sum of its proper divisors (1).

63406561919 is an equidigital number, since it uses as much as digits as its factorization.

63406561919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 63406561919 in words is "sixty-three billion, four hundred six million, five hundred sixty-one thousand, nine hundred nineteen".