11605605646 has 4 divisors (see below), whose sum is σ = 17408408472. Its totient is φ = 5802802822.

The previous prime is 11605605637. The next prime is 11605605677. The reversal of 11605605646 is 64650650611.

11605605646 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 11605605599 and 11605605608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2901401410 + ... + 2901401413.

It is an arithmetic number, because the mean of its divisors is an integer number (4352102118).

Almost surely, 2^11605605646 is an apocalyptic number.

11605605646 is a deficient number, since it is larger than the sum of its proper divisors (5802802826).

11605605646 is an equidigital number, since it uses as much as digits as its factorization.

11605605646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5802802825.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 11605605646 in words is "eleven billion, six hundred five million, six hundred five thousand, six hundred forty-six".