6120819681 has 8 divisors (see below), whose sum is σ = 8235965760. Its totient is φ = 4043110032.

The previous prime is 6120819673. The next prime is 6120819697. The reversal of 6120819681 is 1869180216.

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

It is not a de Polignac number, because 6120819681 - 2³ = 6120819673 is a prime.

It is a super-2 number, since 2×6120819681² = 74928867134633883522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6120819181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9358725 + ... + 9359378.

It is an arithmetic number, because the mean of its divisors is an integer number (1029495720).

Almost surely, 2^6120819681 is an apocalyptic number.

It is an amenable number.

6120819681 is a deficient number, since it is larger than the sum of its proper divisors (2115146079).

6120819681 is a wasteful number, since it uses less digits than its factorization.

6120819681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18718215.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 6120819681 is about 78235.6675756013. The cubic root of 6120819681 is about 1829.2365136076.

Adding to 6120819681 its reverse (1869180216), we get a palindrome (7989999897).

The spelling of 6120819681 in words is "six billion, one hundred twenty million, eight hundred nineteen thousand, six hundred eighty-one".