11655051563 has 4 divisors (see below), whose sum is σ = 11672900688. Its totient is φ = 11637202440.

The previous prime is 11655051547. The next prime is 11655051589. The reversal of 11655051563 is 36515055611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36515055611 = 168481 ⋅216731.

It is a cyclic number.

It is not a de Polignac number, because 11655051563 - 2⁴ = 11655051547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11655051523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8923583 + ... + 8924888.

It is an arithmetic number, because the mean of its divisors is an integer number (2918225172).

Almost surely, 2^11655051563 is an apocalyptic number.

11655051563 is a deficient number, since it is larger than the sum of its proper divisors (17849125).

11655051563 is an equidigital number, since it uses as much as digits as its factorization.

11655051563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17849124.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 11655051563 in words is "eleven billion, six hundred fifty-five million, fifty-one thousand, five hundred sixty-three".