63440021105519 has 2 divisors, whose sum is σ = 63440021105520. Its totient is φ = 63440021105518.

The previous prime is 63440021105509. The next prime is 63440021105543. The reversal of 63440021105519 is 91550112004436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63440021105519 - 2²⁰ = 63440020056943 is a prime.

It is a super-2 number, since 2×63440021105519² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63440021105509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720010552759 + 31720010552760.

It is an arithmetic number, because the mean of its divisors is an integer number (31720010552760).

Almost surely, 2^{63440021105519} is an apocalyptic number.

63440021105519 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440021105519 is an equidigital number, since it uses as much as digits as its factorization.

63440021105519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 63440021105519 in words is "sixty-three trillion, four hundred forty billion, twenty-one million, one hundred five thousand, five hundred nineteen".