261550588 has 12 divisors (see below), whose sum is σ = 492922360. Its totient is φ = 120715632.

The previous prime is 261550579. The next prime is 261550589. The reversal of 261550588 is 885055162.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 261550588.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261550589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514858 + ... + 2514961.

Almost surely, 2^261550588 is an apocalyptic number.

It is an amenable number.

261550588 is a deficient number, since it is larger than the sum of its proper divisors (231371772).

261550588 is a wasteful number, since it uses less digits than its factorization.

261550588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029836 (or 5029834 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The square root of 261550588 is about 16172.5257149278. The cubic root of 261550588 is about 639.5167152260.

The spelling of 261550588 in words is "two hundred sixty-one million, five hundred fifty thousand, five hundred eighty-eight".