261716434 has 8 divisors (see below), whose sum is σ = 448656768. Its totient is φ = 112164180.

The previous prime is 261716417. The next prime is 261716449. The reversal of 261716434 is 434617162.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261716434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9347002 + ... + 9347029.

It is an arithmetic number, because the mean of its divisors is an integer number (56082096).

Almost surely, 2^261716434 is an apocalyptic number.

261716434 is a deficient number, since it is larger than the sum of its proper divisors (186940334).

261716434 is a wasteful number, since it uses less digits than its factorization.

261716434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18694040.

The product of its digits is 24192, while the sum is 34.

The square root of 261716434 is about 16177.6523018638. The cubic root of 261716434 is about 639.6518565517.

The spelling of 261716434 in words is "two hundred sixty-one million, seven hundred sixteen thousand, four hundred thirty-four".