11544111540 has 72 divisors (see below), whose sum is σ = 37710772008. Its totient is φ = 2841626880.

The previous prime is 11544111517. The next prime is 11544111569. The reversal of 11544111540 is 4511144511.

It is a happy number.

11544111540 is a `hidden beast` number, since 1 + 1 + 5 + 4 + 4 + 111 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 87834384 + 11456277156 = 9372^2 + 107034^2 .

It is a super-2 number, since 2×11544111540² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 2464351 + ... + 2469030.

Almost surely, 2^11544111540 is an apocalyptic number.

11544111540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11544111540 is an abundant number, since it is smaller than the sum of its proper divisors (26166660468).

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

11544111540 is a wasteful number, since it uses less digits than its factorization.

11544111540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933409 (or 4933404 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The spelling of 11544111540 in words is "eleven billion, five hundred forty-four million, one hundred eleven thousand, five hundred forty".