11565605645 has 8 divisors (see below), whose sum is σ = 15140429280. Its totient is φ = 8411349520.

The previous prime is 11565605641. The next prime is 11565605657. The reversal of 11565605645 is 54650656511.

It is a happy number.

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

It is not a de Polignac number, because 11565605645 - 2² = 11565605641 is a prime.

It is a super-3 number, since 3×11565605645³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11565605596 and 11565605605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565605641) 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, 105141815 + ... + 105141924.

It is an arithmetic number, because the mean of its divisors is an integer number (1892553660).

Almost surely, 2^11565605645 is an apocalyptic number.

It is an amenable number.

11565605645 is a deficient number, since it is larger than the sum of its proper divisors (3574823635).

11565605645 is a wasteful number, since it uses less digits than its factorization.

11565605645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210283755.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 11565605645 in words is "eleven billion, five hundred sixty-five million, six hundred five thousand, six hundred forty-five".