5011646721 has 4 divisors (see below), whose sum is σ = 6682195632. Its totient is φ = 3341097812.

The previous prime is 5011646681. The next prime is 5011646741. The reversal of 5011646721 is 1276461105.

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 5011646721 - 2⁶ = 5011646657 is a prime.

It is a super-2 number, since 2×5011646721² = 50233205712220103682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5011646741) 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, 835274451 + ... + 835274456.

It is an arithmetic number, because the mean of its divisors is an integer number (1670548908).

Almost surely, 2^5011646721 is an apocalyptic number.

It is an amenable number.

5011646721 is a deficient number, since it is larger than the sum of its proper divisors (1670548911).

5011646721 is a wasteful number, since it uses less digits than its factorization.

5011646721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670548910.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 5011646721 is about 70792.9849702638. The cubic root of 5011646721 is about 1711.3026246306.

The spelling of 5011646721 in words is "five billion, eleven million, six hundred forty-six thousand, seven hundred twenty-one".