11133557671 has 4 divisors (see below), whose sum is σ = 11133810000. Its totient is φ = 11133305344.

The previous prime is 11133557657. The next prime is 11133557711. The reversal of 11133557671 is 17675533111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11133557671 - 2⁵ = 11133557639 is a prime.

It is a super-2 number, since 2×11133557671² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133557621) 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, 40666 + ... + 154663.

It is an arithmetic number, because the mean of its divisors is an integer number (2783452500).

Almost surely, 2^11133557671 is an apocalyptic number.

11133557671 is a deficient number, since it is larger than the sum of its proper divisors (252329).

11133557671 is an equidigital number, since it uses as much as digits as its factorization.

11133557671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252328.

The product of its digits is 66150, while the sum is 40.

The spelling of 11133557671 in words is "eleven billion, one hundred thirty-three million, five hundred fifty-seven thousand, six hundred seventy-one".