5186246721 has 4 divisors (see below), whose sum is σ = 6914995632. Its totient is φ = 3457497812.

The previous prime is 5186246699. The next prime is 5186246731. The reversal of 5186246721 is 1276426815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5186246721 - 2⁹ = 5186246209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5186246731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864374451 + ... + 864374456.

It is an arithmetic number, because the mean of its divisors is an integer number (1728748908).

Almost surely, 2^5186246721 is an apocalyptic number.

It is an amenable number.

5186246721 is a deficient number, since it is larger than the sum of its proper divisors (1728748911).

5186246721 is a wasteful number, since it uses less digits than its factorization.

5186246721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728748910.

The product of its digits is 161280, while the sum is 42.

The square root of 5186246721 is about 72015.6005390499. The cubic root of 5186246721 is about 1730.9494739055.

The spelling of 5186246721 in words is "five billion, one hundred eighty-six million, two hundred forty-six thousand, seven hundred twenty-one".