261675143233421 has 8 divisors (see below), whose sum is σ = 270116674809600. Its totient is φ = 253233636527520.

The previous prime is 261675143233403. The next prime is 261675143233459. The reversal of 261675143233421 is 124332341576162.

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

It is a cyclic number.

It is not a de Polignac number, because 261675143233421 - 2²² = 261675139039117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261675143233421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261675143233121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16480370 + ... + 28194908.

It is an arithmetic number, because the mean of its divisors is an integer number (33764584351200).

Almost surely, 2^{261675143233421} is an apocalyptic number.

It is an amenable number.

261675143233421 is a deficient number, since it is larger than the sum of its proper divisors (8441531576179).

261675143233421 is a wasteful number, since it uses less digits than its factorization.

261675143233421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435139.

The product of its digits is 4354560, while the sum is 50.

The spelling of 261675143233421 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, one hundred forty-three million, two hundred thirty-three thousand, four hundred twenty-one".