261336233244 has 12 divisors (see below), whose sum is σ = 609784544264. Its totient is φ = 87112077744.

The previous prime is 261336233233. The next prime is 261336233281. The reversal of 261336233244 is 442332633162.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10889009707 + ... + 10889009730.

Almost surely, 2^261336233244 is an apocalyptic number.

It is an amenable number.

261336233244 is an abundant number, since it is smaller than the sum of its proper divisors (348448311020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261336233244 is a wasteful number, since it uses less digits than its factorization.

261336233244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21778019444 (or 21778019442 counting only the distinct ones).

The product of its digits is 373248, while the sum is 39.

The spelling of 261336233244 in words is "two hundred sixty-one billion, three hundred thirty-six million, two hundred thirty-three thousand, two hundred forty-four".