128316123397139 has 2 divisors, whose sum is σ = 128316123397140. Its totient is φ = 128316123397138.

The previous prime is 128316123397129. The next prime is 128316123397157. The reversal of 128316123397139 is 931793321613821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128316123397139 - 2¹² = 128316123393043 is a prime.

It is not a weakly prime, because it can be changed into another prime (128316123397129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64158061698569 + 64158061698570.

It is an arithmetic number, because the mean of its divisors is an integer number (64158061698570).

Almost surely, 2^{128316123397139} is an apocalyptic number.

128316123397139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128316123397139 is an equidigital number, since it uses as much as digits as its factorization.

128316123397139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 59.

The spelling of 128316123397139 in words is "one hundred twenty-eight trillion, three hundred sixteen billion, one hundred twenty-three million, three hundred ninety-seven thousand, one hundred thirty-nine".