261822854933 has 4 divisors (see below), whose sum is σ = 261830768928. Its totient is φ = 261814940940.

The previous prime is 261822854897. The next prime is 261822854971. The reversal of 261822854933 is 339458228162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261822854933 - 2¹⁰ = 261822853909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261822854983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3907163 + ... + 3973608.

It is an arithmetic number, because the mean of its divisors is an integer number (65457692232).

Almost surely, 2^261822854933 is an apocalyptic number.

It is an amenable number.

261822854933 is a deficient number, since it is larger than the sum of its proper divisors (7913995).

261822854933 is an equidigital number, since it uses as much as digits as its factorization.

261822854933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913994.

The product of its digits is 4976640, while the sum is 53.

The spelling of 261822854933 in words is "two hundred sixty-one billion, eight hundred twenty-two million, eight hundred fifty-four thousand, nine hundred thirty-three".