11053645621661 has 4 divisors (see below), whose sum is σ = 11703860070012. Its totient is φ = 10403431173312.

The previous prime is 11053645621657. The next prime is 11053645621663. The reversal of 11053645621661 is 16612654635011.

11053645621661 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8585193002500 + 2468452619161 = 2930050^2 + 1571131^2 .

It is a cyclic number.

It is not a de Polignac number, because 11053645621661 - 2² = 11053645621657 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 (11053645621663) 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, 325107224150 + ... + 325107224183.

It is an arithmetic number, because the mean of its divisors is an integer number (2925965017503).

Almost surely, 2^{11053645621661} is an apocalyptic number.

It is an amenable number.

11053645621661 is a deficient number, since it is larger than the sum of its proper divisors (650214448351).

11053645621661 is an equidigital number, since it uses as much as digits as its factorization.

11053645621661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650214448350.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 11053645621661 in words is "eleven trillion, fifty-three billion, six hundred forty-five million, six hundred twenty-one thousand, six hundred sixty-one".