161475313204 has 12 divisors (see below), whose sum is σ = 282609756324. Its totient is φ = 80729668544.

The previous prime is 161475313189. The next prime is 161475313211. The reversal of 161475313204 is 402313574161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142168210704 + 19307102500 = 377052^2 + 138950^2 .

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, 1951417 + ... + 2032480.

It is an arithmetic number, because the mean of its divisors is an integer number (23550813027).

Almost surely, 2^161475313204 is an apocalyptic number.

It is an amenable number.

161475313204 is a deficient number, since it is larger than the sum of its proper divisors (121134443120).

161475313204 is a wasteful number, since it uses less digits than its factorization.

161475313204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994034 (or 3994032 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 161475313204 its reverse (402313574161), we get a palindrome (563788887365).

The spelling of 161475313204 in words is "one hundred sixty-one billion, four hundred seventy-five million, three hundred thirteen thousand, two hundred four".