261440571576313 has 8 divisors (see below), whose sum is σ = 262131019618400. Its totient is φ = 260750126857248.

The previous prime is 261440571576311. The next prime is 261440571576461. The reversal of 261440571576313 is 313675175044162.

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 261440571576313 - 2¹ = 261440571576311 is a prime.

It is a super-2 number, since 2×261440571576313² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261440571576311) 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, 312546493 + ... + 313381861.

It is an arithmetic number, because the mean of its divisors is an integer number (32766377452300).

Almost surely, 2^{261440571576313} is an apocalyptic number.

It is an amenable number.

261440571576313 is a deficient number, since it is larger than the sum of its proper divisors (690448042087).

261440571576313 is an equidigital number, since it uses as much as digits as its factorization.

261440571576313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661511.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 261440571576313 in words is "two hundred sixty-one trillion, four hundred forty billion, five hundred seventy-one million, five hundred seventy-six thousand, three hundred thirteen".