11532543444 has 36 divisors (see below), whose sum is σ = 29289886080. Its totient is φ = 3825959760.

The previous prime is 11532543439. The next prime is 11532543467. The reversal of 11532543444 is 44434523511.

11532543444 is a `hidden beast` number, since 1 + 1 + 532 + 54 + 34 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×11532543444² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11532543399 and 11532543408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751524 + ... + 766715.

Almost surely, 2^11532543444 is an apocalyptic number.

It is an amenable number.

11532543444 is an abundant number, since it is smaller than the sum of its proper divisors (17757342636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11532543444 is a wasteful number, since it uses less digits than its factorization.

11532543444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518460 (or 1518455 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The spelling of 11532543444 in words is "eleven billion, five hundred thirty-two million, five hundred forty-three thousand, four hundred forty-four".