261089698332 has 12 divisors (see below), whose sum is σ = 609209296136. Its totient is φ = 87029899440.

The previous prime is 261089698279. The next prime is 261089698381. The reversal of 261089698332 is 233896980162.

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

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

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, 10878737419 + ... + 10878737442.

Almost surely, 2^261089698332 is an apocalyptic number.

It is an amenable number.

261089698332 is an abundant number, since it is smaller than the sum of its proper divisors (348119597804).

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

261089698332 is a wasteful number, since it uses less digits than its factorization.

261089698332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21757474868 (or 21757474866 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 261089698332 in words is "two hundred sixty-one billion, eighty-nine million, six hundred ninety-eight thousand, three hundred thirty-two".