5186612721 has 8 divisors (see below), whose sum is σ = 6915817984. Its totient is φ = 3457574640.

The previous prime is 5186612707. The next prime is 5186612747. The reversal of 5186612721 is 1272166815.

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

It is not a de Polignac number, because 5186612721 - 2⁹ = 5186612209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5186612721.

It is not an unprimeable number, because it can be changed into a prime (5186612771) 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, 89691 + ... + 135711.

It is an arithmetic number, because the mean of its divisors is an integer number (864477248).

Almost surely, 2^5186612721 is an apocalyptic number.

It is an amenable number.

5186612721 is a deficient number, since it is larger than the sum of its proper divisors (1729205263).

5186612721 is a wasteful number, since it uses less digits than its factorization.

5186612721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83591.

The product of its digits is 40320, while the sum is 39.

The square root of 5186612721 is about 72018.1416102915. The cubic root of 5186612721 is about 1730.9901913800.

The spelling of 5186612721 in words is "five billion, one hundred eighty-six million, six hundred twelve thousand, seven hundred twenty-one".