6111616621 has 8 divisors (see below), whose sum is σ = 6677594784. Its totient is φ = 5547367920.

The previous prime is 6111616607. The next prime is 6111616681. The reversal of 6111616621 is 1266161116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6111616621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6111616601) 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, 424966 + ... + 439111.

It is an arithmetic number, because the mean of its divisors is an integer number (834699348).

Almost surely, 2^6111616621 is an apocalyptic number.

It is an amenable number.

6111616621 is a deficient number, since it is larger than the sum of its proper divisors (565978163).

6111616621 is a wasteful number, since it uses less digits than its factorization.

6111616621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864731.

The product of its digits is 2592, while the sum is 31.

The square root of 6111616621 is about 78176.8291823095. The cubic root of 6111616621 is about 1828.3192607655.

Adding to 6111616621 its reverse (1266161116), we get a palindrome (7377777737).

The spelling of 6111616621 in words is "six billion, one hundred eleven million, six hundred sixteen thousand, six hundred twenty-one".