261323162 has 8 divisors (see below), whose sum is σ = 392176596. Its totient is φ = 130597632.

The previous prime is 261323159. The next prime is 261323189.

261323162 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 209641441 + 51681721 = 14479^2 + 7189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26693 + ... + 35144.

Almost surely, 2^261323162 is an apocalyptic number.

261323162 is a deficient number, since it is larger than the sum of its proper divisors (130853434).

261323162 is a wasteful number, since it uses less digits than its factorization.

261323162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63952.

The product of its digits is 2592, while the sum is 26.

The square root of 261323162 is about 16165.4929402106. The cubic root of 261323162 is about 639.3313018858.

The spelling of 261323162 in words is "two hundred sixty-one million, three hundred twenty-three thousand, one hundred sixty-two".