261488494 has 8 divisors (see below), whose sum is σ = 392984280. Its totient is φ = 130493736.

The previous prime is 261488483. The next prime is 261488501. The reversal of 261488494 is 494884162.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123949 + ... + 126040.

It is an arithmetic number, because the mean of its divisors is an integer number (49123035).

Almost surely, 2^261488494 is an apocalyptic number.

261488494 is a deficient number, since it is larger than the sum of its proper divisors (131495786).

261488494 is a wasteful number, since it uses less digits than its factorization.

261488494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250514.

The product of its digits is 442368, while the sum is 46.

The square root of 261488494 is about 16170.6058637269. The cubic root of 261488494 is about 639.4661025903.

The spelling of 261488494 in words is "two hundred sixty-one million, four hundred eighty-eight thousand, four hundred ninety-four".