261641108 has 24 divisors (see below), whose sum is σ = 464359392. Its totient is φ = 128979104.

The previous prime is 261641087. The next prime is 261641113. The reversal of 261641108 is 801146162.

261641108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95810 + ... + 98502.

It is an arithmetic number, because the mean of its divisors is an integer number (19348308).

Almost surely, 2^261641108 is an apocalyptic number.

It is an amenable number.

261641108 is a deficient number, since it is larger than the sum of its proper divisors (202718284).

261641108 is a wasteful number, since it uses less digits than its factorization.

261641108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 261641108 is about 16175.3240462131. The cubic root of 261641108 is about 639.5904834614.

It can be divided in two parts, 26164 and 1108, that added together give a palindrome (27272).

The spelling of 261641108 in words is "two hundred sixty-one million, six hundred forty-one thousand, one hundred eight".