11545555444 has 6 divisors (see below), whose sum is σ = 20204722034. Its totient is φ = 5772777720.

The previous prime is 11545555363. The next prime is 11545555459. The reversal of 11545555444 is 44455554511.

It can be written as a sum of positive squares in only one way, i.e., 10072531044 + 1473024400 = 100362^2 + 38380^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11545555444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1443194427 + ... + 1443194434.

Almost surely, 2^11545555444 is an apocalyptic number.

It is an amenable number.

11545555444 is a deficient number, since it is larger than the sum of its proper divisors (8659166590).

11545555444 is a wasteful number, since it uses less digits than its factorization.

11545555444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886388865 (or 2886388863 counting only the distinct ones).

The product of its digits is 800000, while the sum is 43.

The spelling of 11545555444 in words is "eleven billion, five hundred forty-five million, five hundred fifty-five thousand, four hundred forty-four".