261448622 has 4 divisors (see below), whose sum is σ = 392172936. Its totient is φ = 130724310.

The previous prime is 261448619. The next prime is 261448633. The reversal of 261448622 is 226844162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226844162 = 2 ⋅113422081.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 65362154 + ... + 65362157.

It is an arithmetic number, because the mean of its divisors is an integer number (98043234).

Almost surely, 2^261448622 is an apocalyptic number.

261448622 is a deficient number, since it is larger than the sum of its proper divisors (130724314).

261448622 is a wasteful number, since it uses less digits than its factorization.

261448622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130724313.

The product of its digits is 36864, while the sum is 35.

The square root of 261448622 is about 16169.3729624868. The cubic root of 261448622 is about 639.4335988167.

The spelling of 261448622 in words is "two hundred sixty-one million, four hundred forty-eight thousand, six hundred twenty-two".