11540043644 has 24 divisors (see below), whose sum is σ = 21563203200. Its totient is φ = 5390797104.

The previous prime is 11540043569. The next prime is 11540043653. The reversal of 11540043644 is 44634004511.

It is a self number, because there is not a number n which added to its sum of digits gives 11540043644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454594 + ... + 1462505.

It is an arithmetic number, because the mean of its divisors is an integer number (898466800).

Almost surely, 2^11540043644 is an apocalyptic number.

It is an amenable number.

11540043644 is a deficient number, since it is larger than the sum of its proper divisors (10023159556).

11540043644 is a wasteful number, since it uses less digits than its factorization.

11540043644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917169 (or 2917167 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 11540043644 in words is "eleven billion, five hundred forty million, forty-three thousand, six hundred forty-four".