138219920659 has 2 divisors, whose sum is σ = 138219920660. Its totient is φ = 138219920658.

The previous prime is 138219920651. The next prime is 138219920753. The reversal of 138219920659 is 956029912831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138219920659 - 2³ = 138219920651 is a prime.

It is not a weakly prime, because it can be changed into another prime (138219920651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69109960329 + 69109960330.

It is an arithmetic number, because the mean of its divisors is an integer number (69109960330).

Almost surely, 2^138219920659 is an apocalyptic number.

138219920659 is a deficient number, since it is larger than the sum of its proper divisors (1).

138219920659 is an equidigital number, since it uses as much as digits as its factorization.

138219920659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 138219920659 in words is "one hundred thirty-eight billion, two hundred nineteen million, nine hundred twenty thousand, six hundred fifty-nine".