261726878 has 16 divisors (see below), whose sum is σ = 448883424. Its totient is φ = 112116480.

The previous prime is 261726869. The next prime is 261726901. The reversal of 261726878 is 878627162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51926 + ... + 56742.

It is an arithmetic number, because the mean of its divisors is an integer number (28055214).

Almost surely, 2^261726878 is an apocalyptic number.

261726878 is a deficient number, since it is larger than the sum of its proper divisors (187156546).

261726878 is a wasteful number, since it uses less digits than its factorization.

261726878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707.

The product of its digits is 451584, while the sum is 47.

The square root of 261726878 is about 16177.9750896087. The cubic root of 261726878 is about 639.6603650419.

The spelling of 261726878 in words is "two hundred sixty-one million, seven hundred twenty-six thousand, eight hundred seventy-eight".