161124521658 has 32 divisors (see below), whose sum is σ = 339252244800. Its totient is φ = 50875019136.

The previous prime is 161124521627. The next prime is 161124521659. The reversal of 161124521658 is 856125421161.

It is a super-2 number, since 2×161124521658² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161124521659) 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, 864660 + ... + 1034352.

It is an arithmetic number, because the mean of its divisors is an integer number (10601632650).

Almost surely, 2^161124521658 is an apocalyptic number.

161124521658 is an abundant number, since it is smaller than the sum of its proper divisors (178127723142).

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

161124521658 is a wasteful number, since it uses less digits than its factorization.

161124521658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178046.

The product of its digits is 115200, while the sum is 42.

The spelling of 161124521658 in words is "one hundred sixty-one billion, one hundred twenty-four million, five hundred twenty-one thousand, six hundred fifty-eight".