11747275661 has 8 divisors (see below), whose sum is σ = 12934979424. Its totient is φ = 10579533520.

The previous prime is 11747275637. The next prime is 11747275667. The reversal of 11747275661 is 16657274711.

11747275661 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 a cyclic number.

It is not a de Polignac number, because 11747275661 - 2¹⁸ = 11747013517 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 (11747275667) 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, 4989170 + ... + 4991523.

It is an arithmetic number, because the mean of its divisors is an integer number (1616872428).

Almost surely, 2^11747275661 is an apocalyptic number.

11747275661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11747275661 is a deficient number, since it is larger than the sum of its proper divisors (1187703763).

11747275661 is a wasteful number, since it uses less digits than its factorization.

11747275661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980811.

The product of its digits is 493920, while the sum is 47.

The spelling of 11747275661 in words is "eleven billion, seven hundred forty-seven million, two hundred seventy-five thousand, six hundred sixty-one".