261060550 has 12 divisors (see below), whose sum is σ = 485572716. Its totient is φ = 104424200.

The previous prime is 261060529. The next prime is 261060587. The reversal of 261060550 is 55060162.

It is a super-2 number, since 2×261060550² = 136305221532605000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2610556 + ... + 2610655.

It is an arithmetic number, because the mean of its divisors is an integer number (40464393).

Almost surely, 2^261060550 is an apocalyptic number.

261060550 is a deficient number, since it is larger than the sum of its proper divisors (224512166).

261060550 is a wasteful number, since it uses less digits than its factorization.

261060550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221223 (or 5221218 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 261060550 is about 16157.3682881836. The cubic root of 261060550 is about 639.1170686182.

The spelling of 261060550 in words is "two hundred sixty-one million, sixty thousand, five hundred fifty".