11253581661 has 8 divisors (see below), whose sum is σ = 17148314944. Its totient is φ = 6430618080.

The previous prime is 11253581627. The next prime is 11253581683. The reversal of 11253581661 is 16618535211.

It is a happy number.

11253581661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11253581661 - 2¹⁴ = 11253565277 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 (11253581621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267942400 + ... + 267942441.

It is an arithmetic number, because the mean of its divisors is an integer number (2143539368).

Almost surely, 2^11253581661 is an apocalyptic number.

It is an amenable number.

11253581661 is a deficient number, since it is larger than the sum of its proper divisors (5894733283).

11253581661 is an equidigital number, since it uses as much as digits as its factorization.

11253581661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535884851.

The product of its digits is 43200, while the sum is 39.

The spelling of 11253581661 in words is "eleven billion, two hundred fifty-three million, five hundred eighty-one thousand, six hundred sixty-one".