261673251841 has 8 divisors (see below), whose sum is σ = 265678434944. Its totient is φ = 257670998640.

The previous prime is 261673251821. The next prime is 261673251869. The reversal of 261673251841 is 148152376162.

261673251841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261673251841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261673251791 and 261673251800.

It is not an unprimeable number, because it can be changed into a prime (261673251811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552150 + ... + 910063.

It is an arithmetic number, because the mean of its divisors is an integer number (33209804368).

Almost surely, 2^261673251841 is an apocalyptic number.

It is an amenable number.

261673251841 is a deficient number, since it is larger than the sum of its proper divisors (4005183103).

261673251841 is a wasteful number, since it uses less digits than its factorization.

261673251841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464951.

The product of its digits is 483840, while the sum is 46.

The spelling of 261673251841 in words is "two hundred sixty-one billion, six hundred seventy-three million, two hundred fifty-one thousand, eight hundred forty-one".