165113913558 has 48 divisors (see below), whose sum is σ = 363232235520. Its totient is φ = 49999432560.

The previous prime is 165113913557. The next prime is 165113913599. The reversal of 165113913558 is 855319311561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165113913557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 965691 + ... + 1123737.

It is an arithmetic number, because the mean of its divisors is an integer number (7567338240).

Almost surely, 2^165113913558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165113913558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181616117760).

165113913558 is an abundant number, since it is smaller than the sum of its proper divisors (198118321962).

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

165113913558 is a wasteful number, since it uses less digits than its factorization.

165113913558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159513 (or 159502 counting only the distinct ones).

The product of its digits is 486000, while the sum is 48.

The spelling of 165113913558 in words is "one hundred sixty-five billion, one hundred thirteen million, nine hundred thirteen thousand, five hundred fifty-eight".