11665456553 has 8 divisors (see below), whose sum is σ = 11815065600. Its totient is φ = 11515896288.

The previous prime is 11665456531. The next prime is 11665456589. The reversal of 11665456553 is 35565456611.

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 11665456553 - 2¹² = 11665452457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11665456498 and 11665456507.

It is not an unprimeable number, because it can be changed into a prime (11665356553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928568 + ... + 941046.

It is an arithmetic number, because the mean of its divisors is an integer number (1476883200).

Almost surely, 2^11665456553 is an apocalyptic number.

It is an amenable number.

11665456553 is a deficient number, since it is larger than the sum of its proper divisors (149609047).

11665456553 is a wasteful number, since it uses less digits than its factorization.

11665456553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24391.

The product of its digits is 1620000, while the sum is 47.

The spelling of 11665456553 in words is "eleven billion, six hundred sixty-five million, four hundred fifty-six thousand, five hundred fifty-three".