261090355 has 8 divisors (see below), whose sum is σ = 313401312. Its totient is φ = 208810368.

The previous prime is 261090331. The next prime is 261090371. The reversal of 261090355 is 553090162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261090355 - 2¹³ = 261082163 is a prime.

It is a Duffinian 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, 19579 + ... + 30091.

It is an arithmetic number, because the mean of its divisors is an integer number (39175164).

Almost surely, 2^261090355 is an apocalyptic number.

261090355 is a deficient number, since it is larger than the sum of its proper divisors (52310957).

261090355 is a wasteful number, since it uses less digits than its factorization.

261090355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15485.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 261090355 is about 16158.2905964709. The cubic root of 261090355 is about 639.1413901270.

The spelling of 261090355 in words is "two hundred sixty-one million, ninety thousand, three hundred fifty-five".