261096605747 has 4 divisors (see below), whose sum is σ = 261098003760. Its totient is φ = 261095207736.

The previous prime is 261096605729. The next prime is 261096605753. The reversal of 261096605747 is 747506690162.

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

It is a cyclic number.

It is not a de Polignac number, because 261096605747 - 2²⁰ = 261095557171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261096605767) 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, 365972 + ... + 810017.

It is an arithmetic number, because the mean of its divisors is an integer number (65274500940).

Almost surely, 2^261096605747 is an apocalyptic number.

261096605747 is a deficient number, since it is larger than the sum of its proper divisors (1398013).

261096605747 is a wasteful number, since it uses less digits than its factorization.

261096605747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398012.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 261096605747 in words is "two hundred sixty-one billion, ninety-six million, six hundred five thousand, seven hundred forty-seven".