138245121563 has 2 divisors, whose sum is σ = 138245121564. Its totient is φ = 138245121562.

The previous prime is 138245121517. The next prime is 138245121593. The reversal of 138245121563 is 365121542831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138245121563 - 2¹⁸ = 138244859419 is a prime.

It is a super-2 number, since 2×138245121563² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138245121563.

It is not a weakly prime, because it can be changed into another prime (138245121593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69122560781 + 69122560782.

It is an arithmetic number, because the mean of its divisors is an integer number (69122560782).

Almost surely, 2^138245121563 is an apocalyptic number.

138245121563 is a deficient number, since it is larger than the sum of its proper divisors (1).

138245121563 is an equidigital number, since it uses as much as digits as its factorization.

138245121563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The spelling of 138245121563 in words is "one hundred thirty-eight billion, two hundred forty-five million, one hundred twenty-one thousand, five hundred sixty-three".