11133557889 has 32 divisors (see below), whose sum is σ = 15975014400. Its totient is φ = 6875951040.

The previous prime is 11133557861. The next prime is 11133557891. The reversal of 11133557889 is 98875533111.

It is a happy number.

It is not a de Polignac number, because 11133557889 - 2¹³ = 11133549697 is a prime.

It is a super-2 number, since 2×11133557889² (a number of 21 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11133557389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633667 + ... + 650999.

It is an arithmetic number, because the mean of its divisors is an integer number (499219200).

Almost surely, 2^11133557889 is an apocalyptic number.

11133557889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11133557889 is a deficient number, since it is larger than the sum of its proper divisors (4841456511).

11133557889 is a wasteful number, since it uses less digits than its factorization.

11133557889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17605.

The product of its digits is 907200, while the sum is 51.

The spelling of 11133557889 in words is "eleven billion, one hundred thirty-three million, five hundred fifty-seven thousand, eight hundred eighty-nine".