161260564 has 6 divisors (see below), whose sum is σ = 282205994. Its totient is φ = 80630280.

The previous prime is 161260559. The next prime is 161260591. The reversal of 161260564 is 465062161.

It can be written as a sum of positive squares in only one way, i.e., 139712400 + 21548164 = 11820^2 + 4642^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20157567 + ... + 20157574.

Almost surely, 2^161260564 is an apocalyptic number.

It is an amenable number.

161260564 is a deficient number, since it is larger than the sum of its proper divisors (120945430).

161260564 is a wasteful number, since it uses less digits than its factorization.

161260564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40315145 (or 40315143 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 161260564 is about 12698.8410494816. The cubic root of 161260564 is about 544.3055026018.

The spelling of 161260564 in words is "one hundred sixty-one million, two hundred sixty thousand, five hundred sixty-four".