128631941839 has 2 divisors, whose sum is σ = 128631941840. Its totient is φ = 128631941838.

The previous prime is 128631941803. The next prime is 128631941873. The reversal of 128631941839 is 938149136821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128631941839 - 2²⁷ = 128497724111 is a prime.

It is a super-2 number, since 2×128631941839² (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 128631941839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128631741839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64315970919 + 64315970920.

It is an arithmetic number, because the mean of its divisors is an integer number (64315970920).

Almost surely, 2^128631941839 is an apocalyptic number.

128631941839 is a deficient number, since it is larger than the sum of its proper divisors (1).

128631941839 is an equidigital number, since it uses as much as digits as its factorization.

128631941839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

It can be divided in two parts, 128631941 and 839, that added together give a triangular number (128632780 = T₁₆₀₃₉).

The spelling of 128631941839 in words is "one hundred twenty-eight billion, six hundred thirty-one million, nine hundred forty-one thousand, eight hundred thirty-nine".