11051640640661 has 4 divisors (see below), whose sum is σ = 11161062825324. Its totient is φ = 10942218456000.

The previous prime is 11051640640577. The next prime is 11051640640721. The reversal of 11051640640661 is 16604604615011.

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 6627689824900 + 4423950815761 = 2574430^2 + 2103319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11051640640661 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 (11051640640361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54711092180 + ... + 54711092381.

It is an arithmetic number, because the mean of its divisors is an integer number (2790265706331).

Almost surely, 2^{11051640640661} is an apocalyptic number.

It is an amenable number.

11051640640661 is a deficient number, since it is larger than the sum of its proper divisors (109422184663).

11051640640661 is a wasteful number, since it uses less digits than its factorization.

11051640640661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109422184662.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 11051640640661 in words is "eleven trillion, fifty-one billion, six hundred forty million, six hundred forty thousand, six hundred sixty-one".