261826467 has 32 divisors (see below), whose sum is σ = 411436032. Its totient is φ = 144975744.

The previous prime is 261826459. The next prime is 261826493. The reversal of 261826467 is 764628162.

It is not a de Polignac number, because 261826467 - 2³ = 261826459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261826417) 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 31 ways as a sum of consecutive naturals, for example, 245778 + ... + 246840.

It is an arithmetic number, because the mean of its divisors is an integer number (12857376).

Almost surely, 2^261826467 is an apocalyptic number.

261826467 is a deficient number, since it is larger than the sum of its proper divisors (149609565).

261826467 is a wasteful number, since it uses less digits than its factorization.

261826467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

The product of its digits is 193536, while the sum is 42.

The square root of 261826467 is about 16181.0527160627. The cubic root of 261826467 is about 639.7414865765.

The spelling of 261826467 in words is "two hundred sixty-one million, eight hundred twenty-six thousand, four hundred sixty-seven".