63242636820509 has 2 divisors, whose sum is σ = 63242636820510. Its totient is φ = 63242636820508.

The previous prime is 63242636820463. The next prime is 63242636820523. The reversal of 63242636820509 is 90502863624236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63188938027609 + 53698792900 = 7949147^2 + 231730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63242636820509 is a prime.

It is a super-2 number, since 2×63242636820509² (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 (63242636120509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31621318410254 + 31621318410255.

It is an arithmetic number, because the mean of its divisors is an integer number (31621318410255).

Almost surely, 2^{63242636820509} is an apocalyptic number.

It is an amenable number.

63242636820509 is a deficient number, since it is larger than the sum of its proper divisors (1).

63242636820509 is an equidigital number, since it uses as much as digits as its factorization.

63242636820509 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 63242636820509 in words is "sixty-three trillion, two hundred forty-two billion, six hundred thirty-six million, eight hundred twenty thousand, five hundred nine".