115555743138 has 64 divisors (see below), whose sum is σ = 256267597824. Its totient is φ = 34443360000.

The previous prime is 115555743133. The next prime is 115555743211. The reversal of 115555743138 is 831347555511.

It is not an unprimeable number, because it can be changed into a prime (115555743133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2000563 + ... + 2057513.

It is an arithmetic number, because the mean of its divisors is an integer number (4004181216).

Almost surely, 2^115555743138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115555743138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128133798912).

115555743138 is an abundant number, since it is smaller than the sum of its proper divisors (140711854686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115555743138 is a wasteful number, since it uses less digits than its factorization.

115555743138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57471.

The product of its digits is 1260000, while the sum is 48.

The spelling of 115555743138 in words is "one hundred fifteen billion, five hundred fifty-five million, seven hundred forty-three thousand, one hundred thirty-eight".