11416642445561 has 8 divisors (see below), whose sum is σ = 11810530377480. Its totient is φ = 11022768554112.

The previous prime is 11416642445557. The next prime is 11416642445581. The reversal of 11416642445561 is 16554424661411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30445015225 + 11386197430336 = 174485^2 + 3374344^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11416642445561 - 2² = 11416642445557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11416642445531) 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, 1842380 + ... + 5121293.

It is an arithmetic number, because the mean of its divisors is an integer number (1476316297185).

Almost surely, 2^{11416642445561} is an apocalyptic number.

It is an amenable number.

11416642445561 is a deficient number, since it is larger than the sum of its proper divisors (393887931919).

11416642445561 is an equidigital number, since it uses as much as digits as its factorization.

11416642445561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020235.

The product of its digits is 2764800, while the sum is 50.

The spelling of 11416642445561 in words is "eleven trillion, four hundred sixteen billion, six hundred forty-two million, four hundred forty-five thousand, five hundred sixty-one".