261613266483 has 4 divisors (see below), whose sum is σ = 348817688648. Its totient is φ = 174408844320.

The previous prime is 261613266433. The next prime is 261613266517. The reversal of 261613266483 is 384662316162.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 261613266483 - 2²⁰ = 261612217907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261613266433) 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, 43602211078 + ... + 43602211083.

It is an arithmetic number, because the mean of its divisors is an integer number (87204422162).

Almost surely, 2^261613266483 is an apocalyptic number.

261613266483 is a deficient number, since it is larger than the sum of its proper divisors (87204422165).

261613266483 is an equidigital number, since it uses as much as digits as its factorization.

261613266483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87204422164.

The product of its digits is 1492992, while the sum is 48.

The spelling of 261613266483 in words is "two hundred sixty-one billion, six hundred thirteen million, two hundred sixty-six thousand, four hundred eighty-three".