261132364 has 12 divisors (see below), whose sum is σ = 458978800. Its totient is φ = 129995568.

The previous prime is 261132353. The next prime is 261132373. The reversal of 261132364 is 463231162.

It is a super-2 number, since 2×261132364² = 136380223056456992, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 141624 + ... + 143455.

Almost surely, 2^261132364 is an apocalyptic number.

It is an amenable number.

261132364 is a deficient number, since it is larger than the sum of its proper divisors (197846436).

261132364 is a wasteful number, since it uses less digits than its factorization.

261132364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285312 (or 285310 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 261132364 is about 16159.5904651077. The cubic root of 261132364 is about 639.1756672144.

The spelling of 261132364 in words is "two hundred sixty-one million, one hundred thirty-two thousand, three hundred sixty-four".