11443642038540 has 120 divisors (see below), whose sum is σ = 35908847572752. Its totient is φ = 3050811734400.

The previous prime is 11443642038523. The next prime is 11443642038559. The reversal of 11443642038540 is 4583024634411.

11443642038540 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 36 + 42 + 0 + 38 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5041287 + ... + 6949953.

Almost surely, 2^{11443642038540} is an apocalyptic number.

11443642038540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11443642038540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17954423786376).

11443642038540 is an abundant number, since it is smaller than the sum of its proper divisors (24465205534212).

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

11443642038540 is a wasteful number, since it uses less digits than its factorization.

11443642038540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912389 (or 1912378 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 11443642038540 in words is "eleven trillion, four hundred forty-three billion, six hundred forty-two million, thirty-eight thousand, five hundred forty".