4087543644 has 72 divisors (see below), whose sum is σ = 10900547840. Its totient is φ = 1287915552.

The previous prime is 4087543643. The next prime is 4087543651. The reversal of 4087543644 is 4463457804.

4087543644 is a `hidden beast` number, since 40 + 8 + 7 + 543 + 64 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 4087543644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4087543643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310239 + ... + 323145.

Almost surely, 2^4087543644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4087543644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5450273920).

4087543644 is an abundant number, since it is smaller than the sum of its proper divisors (6813004196).

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

4087543644 is a wasteful number, since it uses less digits than its factorization.

4087543644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13399 (or 13394 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The square root of 4087543644 is about 63933.9005849010. The cubic root of 4087543644 is about 1598.8981533621.

The spelling of 4087543644 in words is "four billion, eighty-seven million, five hundred forty-three thousand, six hundred forty-four".