261189596 has 24 divisors (see below), whose sum is σ = 462104496. Its totient is φ = 129168000.

The previous prime is 261189589. The next prime is 261189619. The reversal of 261189596 is 695981162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261189596.

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, 156800 + ... + 158456.

It is an arithmetic number, because the mean of its divisors is an integer number (19254354).

Almost surely, 2^261189596 is an apocalyptic number.

It is an amenable number.

261189596 is a deficient number, since it is larger than the sum of its proper divisors (200914900).

261189596 is a wasteful number, since it uses less digits than its factorization.

261189596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2067 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 261189596 is about 16161.3612050471. The cubic root of 261189596 is about 639.2223595368. Note that the first 3 decimals are identical.

The spelling of 261189596 in words is "two hundred sixty-one million, one hundred eighty-nine thousand, five hundred ninety-six".