63642121339 has 2 divisors, whose sum is σ = 63642121340. Its totient is φ = 63642121338.

The previous prime is 63642121331. The next prime is 63642121369. The reversal of 63642121339 is 93312124636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63642121339 - 2³ = 63642121331 is a prime.

It is not a weakly prime, because it can be changed into another prime (63642121331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31821060669 + 31821060670.

It is an arithmetic number, because the mean of its divisors is an integer number (31821060670).

Almost surely, 2^63642121339 is an apocalyptic number.

63642121339 is a deficient number, since it is larger than the sum of its proper divisors (1).

63642121339 is an equidigital number, since it uses as much as digits as its factorization.

63642121339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 40.

The spelling of 63642121339 in words is "sixty-three billion, six hundred forty-two million, one hundred twenty-one thousand, three hundred thirty-nine".