161124521660 has 48 divisors (see below), whose sum is σ = 343235999232. Its totient is φ = 63521908800.

The previous prime is 161124521659. The next prime is 161124521683. The reversal of 161124521660 is 66125421161.

It is a super-2 number, since 2×161124521660² (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 161124521660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4940969 + ... + 4973471.

It is an arithmetic number, because the mean of its divisors is an integer number (7150749984).

Almost surely, 2^161124521660 is an apocalyptic number.

161124521660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161124521660 is an abundant number, since it is smaller than the sum of its proper divisors (182111477572).

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

161124521660 is a wasteful number, since it uses less digits than its factorization.

161124521660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36074 (or 36072 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 161124521660 in words is "one hundred sixty-one billion, one hundred twenty-four million, five hundred twenty-one thousand, six hundred sixty".