11607553661 has 8 divisors (see below), whose sum is σ = 12823075200. Its totient is φ = 10418747040.

The previous prime is 11607553651. The next prime is 11607553667. The reversal of 11607553661 is 16635570611.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11607553661 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 (11607553667) 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, 6677816 + ... + 6679553.

It is an arithmetic number, because the mean of its divisors is an integer number (1602884400).

Almost surely, 2^11607553661 is an apocalyptic number.

11607553661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11607553661 is a deficient number, since it is larger than the sum of its proper divisors (1215521539).

11607553661 is a wasteful number, since it uses less digits than its factorization.

11607553661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357459.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 11607553661 in words is "eleven billion, six hundred seven million, five hundred fifty-three thousand, six hundred sixty-one".