261641852 has 6 divisors (see below), whose sum is σ = 457873248. Its totient is φ = 130820924.

The previous prime is 261641851. The next prime is 261641873. The reversal of 261641852 is 258146162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261641851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32705228 + ... + 32705235.

It is an arithmetic number, because the mean of its divisors is an integer number (76312208).

Almost surely, 2^261641852 is an apocalyptic number.

It is an amenable number.

261641852 is a deficient number, since it is larger than the sum of its proper divisors (196231396).

261641852 is a wasteful number, since it uses less digits than its factorization.

261641852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65410467 (or 65410465 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 261641852 is about 16175.3470441904. The cubic root of 261641852 is about 639.5910897052.

The spelling of 261641852 in words is "two hundred sixty-one million, six hundred forty-one thousand, eight hundred fifty-two".