161150045504 has 28 divisors (see below), whose sum is σ = 365465282784. Its totient is φ = 69064305024.

The previous prime is 161150045473. The next prime is 161150045513. The reversal of 161150045504 is 405540051161.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×161150045504² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179854514 + ... + 179855409.

It is an arithmetic number, because the mean of its divisors is an integer number (13052331528).

Almost surely, 2^161150045504 is an apocalyptic number.

161150045504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161150045504 is an abundant number, since it is smaller than the sum of its proper divisors (204315237280).

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

161150045504 is an equidigital number, since it uses as much as digits as its factorization.

161150045504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359709942 (or 359709932 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 161150045504 its reverse (405540051161), we get a palindrome (566690096665).

The spelling of 161150045504 in words is "one hundred sixty-one billion, one hundred fifty million, forty-five thousand, five hundred four".