261421056422267 has 8 divisors (see below), whose sum is σ = 314491496448000. Its totient is φ = 212281760102184.

The previous prime is 261421056422177. The next prime is 261421056422299. The reversal of 261421056422267 is 762224650124162.

It is a happy number.

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 261421056422267 - 2⁸ = 261421056422011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261421056412267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982785926267 + ... + 982785926532.

It is an arithmetic number, because the mean of its divisors is an integer number (39311437056000).

Almost surely, 2^{261421056422267} is an apocalyptic number.

261421056422267 is a deficient number, since it is larger than the sum of its proper divisors (53070440025733).

261421056422267 is a wasteful number, since it uses less digits than its factorization.

261421056422267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965571852825.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 261421056422267 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, fifty-six million, four hundred twenty-two thousand, two hundred sixty-seven".