6112819981 has 2 divisors, whose sum is σ = 6112819982. Its totient is φ = 6112819980.

The previous prime is 6112819967. The next prime is 6112820003. The reversal of 6112819981 is 1899182116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5792732100 + 320087881 = 76110^2 + 17891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6112819981 is a prime.

It is a super-2 number, since 2×6112819981² = 74733136240225680722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6112819961) 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 as a sum of consecutive naturals, namely, 3056409990 + 3056409991.

It is an arithmetic number, because the mean of its divisors is an integer number (3056409991).

Almost surely, 2^6112819981 is an apocalyptic number.

It is an amenable number.

6112819981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6112819981 is an equidigital number, since it uses as much as digits as its factorization.

6112819981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 46.

The square root of 6112819981 is about 78184.5252016024. The cubic root of 6112819981 is about 1828.4392498518.

The spelling of 6112819981 in words is "six billion, one hundred twelve million, eight hundred nineteen thousand, nine hundred eighty-one".