161170516 has 24 divisors (see below), whose sum is σ = 314221320. Its totient is φ = 71820672.

The previous prime is 161170441. The next prime is 161170547. The reversal of 161170516 is 615071161.

It can be written as a sum of positive squares in 4 ways, for example, as 15968016 + 145202500 = 3996^2 + 12050^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51931 + ... + 54946.

It is an arithmetic number, because the mean of its divisors is an integer number (13092555).

Almost surely, 2^161170516 is an apocalyptic number.

It is an amenable number.

161170516 is a deficient number, since it is larger than the sum of its proper divisors (153050804).

161170516 is a wasteful number, since it uses less digits than its factorization.

161170516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106923 (or 106921 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 161170516 is about 12695.2950339880. The cubic root of 161170516 is about 544.2041702269.

It can be divided in two parts, 1611 and 70516, that added together give a palindrome (72127).

The spelling of 161170516 in words is "one hundred sixty-one million, one hundred seventy thousand, five hundred sixteen".