128617486139 has 2 divisors, whose sum is σ = 128617486140. Its totient is φ = 128617486138.

The previous prime is 128617486117. The next prime is 128617486159. The reversal of 128617486139 is 931684716821.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (931684716821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128617486139 - 2³² = 124322518843 is a prime.

It is not a weakly prime, because it can be changed into another prime (128617486159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64308743069 + 64308743070.

It is an arithmetic number, because the mean of its divisors is an integer number (64308743070).

Almost surely, 2^128617486139 is an apocalyptic number.

128617486139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128617486139 is an equidigital number, since it uses as much as digits as its factorization.

128617486139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The spelling of 128617486139 in words is "one hundred twenty-eight billion, six hundred seventeen million, four hundred eighty-six thousand, one hundred thirty-nine".