261463846 has 8 divisors (see below), whose sum is σ = 448223760. Its totient is φ = 112055928.

The previous prime is 261463843. The next prime is 261463879. The reversal of 261463846 is 648364162.

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

It is a super-2 number, since 2×261463846² = 136726685530223432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261463799 and 261463808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261463841) 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 in 3 ways as a sum of consecutive naturals, for example, 9337981 + ... + 9338008.

It is an arithmetic number, because the mean of its divisors is an integer number (56027970).

Almost surely, 2^261463846 is an apocalyptic number.

261463846 is a deficient number, since it is larger than the sum of its proper divisors (186759914).

261463846 is a wasteful number, since it uses less digits than its factorization.

261463846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18675998.

The product of its digits is 165888, while the sum is 40.

The square root of 261463846 is about 16169.8437221885. The cubic root of 261463846 is about 639.4460098570.

It can be divided in two parts, 26146 and 3846, that added together give a palindrome (29992).

The spelling of 261463846 in words is "two hundred sixty-one million, four hundred sixty-three thousand, eight hundred forty-six".