4521999687 has 8 divisors (see below), whose sum is σ = 6029873136. Its totient is φ = 3014396352.

The previous prime is 4521999683. The next prime is 4521999749. The reversal of 4521999687 is 7869991254.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4521999687 - 2² = 4521999683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4521999687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521999683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24558 + ... + 98219.

It is an arithmetic number, because the mean of its divisors is an integer number (753734142).

Almost surely, 2^4521999687 is an apocalyptic number.

4521999687 is a deficient number, since it is larger than the sum of its proper divisors (1507873449).

4521999687 is a wasteful number, since it uses less digits than its factorization.

4521999687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135057.

The product of its digits is 9797760, while the sum is 60.

The square root of 4521999687 is about 67245.8153865354. The cubic root of 4521999687 is about 1653.6496729511.

The spelling of 4521999687 in words is "four billion, five hundred twenty-one million, nine hundred ninety-nine thousand, six hundred eighty-seven".