118128637439 has 16 divisors (see below), whose sum is σ = 125325779040. Its totient is φ = 111146112000.

The previous prime is 118128637411. The next prime is 118128637453. The reversal of 118128637439 is 934736821811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118128637439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118128637499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991124 + ... + 1103894.

It is an arithmetic number, because the mean of its divisors is an integer number (7832861190).

Almost surely, 2^118128637439 is an apocalyptic number.

118128637439 is a deficient number, since it is larger than the sum of its proper divisors (7197141601).

118128637439 is a wasteful number, since it uses less digits than its factorization.

118128637439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113722.

The product of its digits is 1741824, while the sum is 53.

The spelling of 118128637439 in words is "one hundred eighteen billion, one hundred twenty-eight million, six hundred thirty-seven thousand, four hundred thirty-nine".