260508561 has 8 divisors (see below), whose sum is σ = 367776864. Its totient is φ = 163456320.

The previous prime is 260508559. The next prime is 260508571. The reversal of 260508561 is 165805062.

260508561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 260508561 - 2¹ = 260508559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (260508551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2553955 + ... + 2554056.

It is an arithmetic number, because the mean of its divisors is an integer number (45972108).

Almost surely, 2^260508561 is an apocalyptic number.

It is an amenable number.

260508561 is a deficient number, since it is larger than the sum of its proper divisors (107268303).

260508561 is a wasteful number, since it uses less digits than its factorization.

260508561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108031.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 260508561 is about 16140.2775998432. The cubic root of 260508561 is about 638.6662989551. Note that the first 3 decimals are identical.

The spelling of 260508561 in words is "two hundred sixty million, five hundred eight thousand, five hundred sixty-one".