261726958 has 4 divisors (see below), whose sum is σ = 392590440. Its totient is φ = 130863478.

The previous prime is 261726953. The next prime is 261726967. The reversal of 261726958 is 859627162.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261726953) by changing a digit.

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 as a sum of consecutive naturals, namely, 65431738 + ... + 65431741.

It is an arithmetic number, because the mean of its divisors is an integer number (98147610).

Almost surely, 2^261726958 is an apocalyptic number.

261726958 is a deficient number, since it is larger than the sum of its proper divisors (130863482).

261726958 is a wasteful number, since it uses less digits than its factorization.

261726958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130863481.

The product of its digits is 362880, while the sum is 46.

The square root of 261726958 is about 16177.9775621058. The cubic root of 261726958 is about 639.6604302152.

The spelling of 261726958 in words is "two hundred sixty-one million, seven hundred twenty-six thousand, nine hundred fifty-eight".