11561664052 has 6 divisors (see below), whose sum is σ = 20232912098. Its totient is φ = 5780832024.

The previous prime is 11561664047. The next prime is 11561664067. The reversal of 11561664052 is 25046616511.

It can be written as a sum of positive squares in only one way, i.e., 11192793616 + 368870436 = 105796^2 + 19206^2 .

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, 1445208003 + ... + 1445208010.

Almost surely, 2^11561664052 is an apocalyptic number.

It is an amenable number.

11561664052 is a deficient number, since it is larger than the sum of its proper divisors (8671248046).

11561664052 is a wasteful number, since it uses less digits than its factorization.

11561664052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890416017 (or 2890416015 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 11561664052 in words is "eleven billion, five hundred sixty-one million, six hundred sixty-four thousand, fifty-two".