11552571989 has 4 divisors (see below), whose sum is σ = 13202939424. Its totient is φ = 9902204556.

The previous prime is 11552571983. The next prime is 11552572061. The reversal of 11552571989 is 98917525511.

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 a cyclic number.

It is not a de Polignac number, because 11552571989 - 2¹² = 11552567893 is a prime.

It is a super-2 number, since 2×11552571989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11552571989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11552571983) 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, 825183707 + ... + 825183720.

It is an arithmetic number, because the mean of its divisors is an integer number (3300734856).

Almost surely, 2^11552571989 is an apocalyptic number.

It is an amenable number.

11552571989 is a deficient number, since it is larger than the sum of its proper divisors (1650367435).

11552571989 is an equidigital number, since it uses as much as digits as its factorization.

11552571989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650367434.

The product of its digits is 1134000, while the sum is 53.

The spelling of 11552571989 in words is "eleven billion, five hundred fifty-two million, five hundred seventy-one thousand, nine hundred eighty-nine".