11544172065 has 24 divisors (see below), whose sum is σ = 21186952488. Its totient is φ = 5794721280.

The previous prime is 11544172049. The next prime is 11544172109. The reversal of 11544172065 is 56027144511.

11544172065 is a `hidden beast` number, since 1 + 1 + 5 + 441 + 7 + 206 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 321735969 + 11222436096 = 17937^2 + 105936^2 .

It is not a de Polignac number, because 11544172065 - 2⁴ = 11544172049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7544446 + ... + 7545975.

It is an arithmetic number, because the mean of its divisors is an integer number (882789687).

Almost surely, 2^11544172065 is an apocalyptic number.

11544172065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11544172065 is a deficient number, since it is larger than the sum of its proper divisors (9642780423).

11544172065 is a wasteful number, since it uses less digits than its factorization.

11544172065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15090449 (or 15090446 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 11544172065 in words is "eleven billion, five hundred forty-four million, one hundred seventy-two thousand, sixty-five".