11534693889 has 4 divisors (see below), whose sum is σ = 15379591856. Its totient is φ = 7689795924.

The previous prime is 11534693887. The next prime is 11534693903. The reversal of 11534693889 is 98839643511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11534693889 - 2¹ = 11534693887 is a prime.

It is a super-2 number, since 2×11534693889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11534693887) 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, 1922448979 + ... + 1922448984.

It is an arithmetic number, because the mean of its divisors is an integer number (3844897964).

Almost surely, 2^11534693889 is an apocalyptic number.

It is an amenable number.

11534693889 is a deficient number, since it is larger than the sum of its proper divisors (3844897967).

11534693889 is an equidigital number, since it uses as much as digits as its factorization.

11534693889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844897966.

The product of its digits is 5598720, while the sum is 57.

The spelling of 11534693889 in words is "eleven billion, five hundred thirty-four million, six hundred ninety-three thousand, eight hundred eighty-nine".