5611333721 has 8 divisors (see below), whose sum is σ = 6418392384. Its totient is φ = 4805634960.

The previous prime is 5611333687. The next prime is 5611333747. The reversal of 5611333721 is 1273331165.

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

It is not a de Polignac number, because 5611333721 - 2⁶ = 5611333657 is a prime.

It is a super-2 number, since 2×5611333721² = 62974132256863411682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611333771) 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, 331115 + ... + 347648.

It is an arithmetic number, because the mean of its divisors is an integer number (802299048).

Almost surely, 2^5611333721 is an apocalyptic number.

It is an amenable number.

5611333721 is a deficient number, since it is larger than the sum of its proper divisors (807058663).

5611333721 is a wasteful number, since it uses less digits than its factorization.

5611333721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679951.

The product of its digits is 11340, while the sum is 32.

The square root of 5611333721 is about 74908.8360675828. The cubic root of 5611333721 is about 1777.0052028801.

Adding to 5611333721 its reverse (1273331165), we get a palindrome (6884664886).

The spelling of 5611333721 in words is "five billion, six hundred eleven million, three hundred thirty-three thousand, seven hundred twenty-one".