161132669 has 6 divisors (see below), whose sum is σ = 165606714. Its totient is φ = 156776400.

The previous prime is 161132663. The next prime is 161132683. The reversal of 161132669 is 966231161.

It can be written as a sum of positive squares in 3 ways, for example, as 117440569 + 43692100 = 10837^2 + 6610^2 .

It is not a de Polignac number, because 161132669 - 2¹² = 161128573 is a prime.

It is a super-2 number, since 2×161132669² = 51927474038127122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161132663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57482 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (27601119).

Almost surely, 2^161132669 is an apocalyptic number.

It is an amenable number.

161132669 is a deficient number, since it is larger than the sum of its proper divisors (4474045).

161132669 is an equidigital number, since it uses as much as digits as its factorization.

161132669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117775 (or 117738 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 161132669 is about 12693.8043548812. The cubic root of 161132669 is about 544.1615691603.

The spelling of 161132669 in words is "one hundred sixty-one million, one hundred thirty-two thousand, six hundred sixty-nine".