4521686999 has 4 divisors (see below), whose sum is σ = 4563945864. Its totient is φ = 4479428136.

The previous prime is 4521686963. The next prime is 4521687007. The reversal of 4521686999 is 9996861254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4521686999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521689999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21129272 + ... + 21129485.

It is an arithmetic number, because the mean of its divisors is an integer number (1140986466).

Almost surely, 2^4521686999 is an apocalyptic number.

4521686999 is a deficient number, since it is larger than the sum of its proper divisors (42258865).

4521686999 is a wasteful number, since it uses less digits than its factorization.

4521686999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42258864.

The product of its digits is 8398080, while the sum is 59.

The square root of 4521686999 is about 67243.4903838282. The cubic root of 4521686999 is about 1653.6115564567.

The spelling of 4521686999 in words is "four billion, five hundred twenty-one million, six hundred eighty-six thousand, nine hundred ninety-nine".