11565761673 has 4 divisors (see below), whose sum is σ = 15421015568. Its totient is φ = 7710507780.

The previous prime is 11565761671. The next prime is 11565761677. The reversal of 11565761673 is 37616756511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11565761673 - 2¹ = 11565761671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11565761671) 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, 1927626943 + ... + 1927626948.

It is an arithmetic number, because the mean of its divisors is an integer number (3855253892).

Almost surely, 2^11565761673 is an apocalyptic number.

It is an amenable number.

11565761673 is a deficient number, since it is larger than the sum of its proper divisors (3855253895).

11565761673 is an equidigital number, since it uses as much as digits as its factorization.

11565761673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855253894.

The product of its digits is 793800, while the sum is 48.

The spelling of 11565761673 in words is "eleven billion, five hundred sixty-five million, seven hundred sixty-one thousand, six hundred seventy-three".