11611440661 has 8 divisors (see below), whose sum is σ = 11834926560. Its totient is φ = 11388844272.

The previous prime is 11611440601. The next prime is 11611440679. The reversal of 11611440661 is 16604411611.

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 11611440661 - 2²³ = 11603052053 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 (11611440601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195990 + ... + 248263.

It is an arithmetic number, because the mean of its divisors is an integer number (1479365820).

Almost surely, 2^11611440661 is an apocalyptic number.

It is an amenable number.

11611440661 is a deficient number, since it is larger than the sum of its proper divisors (223485899).

11611440661 is an equidigital number, since it uses as much as digits as its factorization.

11611440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444755.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 11611440661 in words is "eleven billion, six hundred eleven million, four hundred forty thousand, six hundred sixty-one".