261364336 has 20 divisors (see below), whose sum is σ = 514978200. Its totient is φ = 128466752.

The previous prime is 261364331. The next prime is 261364373. The reversal of 261364336 is 633463162.

It is a super-2 number, since 2×261364336² = 136622632265441792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261364331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137491 + ... + 139378.

It is an arithmetic number, because the mean of its divisors is an integer number (25748910).

Almost surely, 2^261364336 is an apocalyptic number.

It is an amenable number.

261364336 is a deficient number, since it is larger than the sum of its proper divisors (253613864).

261364336 is a wasteful number, since it uses less digits than its factorization.

261364336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276936 (or 276930 counting only the distinct ones).

The product of its digits is 46656, while the sum is 34.

The square root of 261364336 is about 16166.7664051906. The cubic root of 261364336 is about 639.3648777393.

The spelling of 261364336 in words is "two hundred sixty-one million, three hundred sixty-four thousand, three hundred thirty-six".