261748799 has 8 divisors (see below), whose sum is σ = 282406320. Its totient is φ = 241166016.

The previous prime is 261748759. The next prime is 261748801. The reversal of 261748799 is 997847162.

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

It is a de Polignac number, because none of the positive numbers 2^k-261748799 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 261748799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261748759) 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 7 ways as a sum of consecutive naturals, for example, 11294 + ... + 25515.

It is an arithmetic number, because the mean of its divisors is an integer number (35300790).

Almost surely, 2^261748799 is an apocalyptic number.

261748799 is a deficient number, since it is larger than the sum of its proper divisors (20657521).

261748799 is a wasteful number, since it uses less digits than its factorization.

261748799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37369.

The product of its digits is 1524096, while the sum is 53.

The square root of 261748799 is about 16178.6525705944. The cubic root of 261748799 is about 639.6782228479.

The spelling of 261748799 in words is "two hundred sixty-one million, seven hundred forty-eight thousand, seven hundred ninety-nine".