5721686458 has 4 divisors (see below), whose sum is σ = 8582529690. Its totient is φ = 2860843228.

The previous prime is 5721686449. The next prime is 5721686521. The reversal of 5721686458 is 8546861275.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4519469529 + 1202216929 = 67227^2 + 34673^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430421613 + ... + 1430421616.

Almost surely, 2^5721686458 is an apocalyptic number.

5721686458 is a deficient number, since it is larger than the sum of its proper divisors (2860843232).

5721686458 is a wasteful number, since it uses less digits than its factorization.

5721686458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860843231.

The product of its digits is 3225600, while the sum is 52.

The square root of 5721686458 is about 75641.8300809810. The cubic root of 5721686458 is about 1788.5785515124.

The spelling of 5721686458 in words is "five billion, seven hundred twenty-one million, six hundred eighty-six thousand, four hundred fifty-eight".