11165050051661 has 4 divisors (see below), whose sum is σ = 12180054601824. Its totient is φ = 10150045501500.

The previous prime is 11165050051601. The next prime is 11165050051711. The reversal of 11165050051661 is 16615005056111.

It is a happy number.

11165050051661 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11165050051661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11165050051601) 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, 507502275065 + ... + 507502275086.

It is an arithmetic number, because the mean of its divisors is an integer number (3045013650456).

Almost surely, 2^{11165050051661} is an apocalyptic number.

11165050051661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11165050051661 is a deficient number, since it is larger than the sum of its proper divisors (1015004550163).

11165050051661 is a wasteful number, since it uses less digits than its factorization.

11165050051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015004550162.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 11165050051661 in words is "eleven trillion, one hundred sixty-five billion, fifty million, fifty-one thousand, six hundred sixty-one".