261053759 has 8 divisors (see below), whose sum is σ = 276759168. Its totient is φ = 245803680.

The previous prime is 261053747. The next prime is 261053761. The reversal of 261053759 is 957350162.

It is a happy number.

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 261053759 - 2⁴ = 261053743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261053729) 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, 112652 + ... + 114945.

It is an arithmetic number, because the mean of its divisors is an integer number (34594896).

Almost surely, 2^261053759 is an apocalyptic number.

261053759 is a deficient number, since it is larger than the sum of its proper divisors (15705409).

261053759 is a wasteful number, since it uses less digits than its factorization.

261053759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227665.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 261053759 is about 16157.1581350187. The cubic root of 261053759 is about 639.1115267600. Note that the first 3 decimals are identical.

The spelling of 261053759 in words is "two hundred sixty-one million, fifty-three thousand, seven hundred fifty-nine".