11544777864 has 24 divisors (see below), whose sum is σ = 31267106910. Its totient is φ = 3848259264.

The previous prime is 11544777817. The next prime is 11544777883. The reversal of 11544777864 is 46877744511.

11544777864 is a `hidden beast` number, since 11 + 544 + 7 + 7 + 7 + 86 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8922313764 + 2622464100 = 94458^2 + 51210^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11544777864.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80171997 + ... + 80172140.

Almost surely, 2^11544777864 is an apocalyptic number.

It is an amenable number.

11544777864 is an abundant number, since it is smaller than the sum of its proper divisors (19722329046).

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

11544777864 is a wasteful number, since it uses less digits than its factorization.

11544777864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160344149 (or 160344142 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 11544777864 in words is "eleven billion, five hundred forty-four million, seven hundred seventy-seven thousand, eight hundred sixty-four".