6189949081 has 2 divisors, whose sum is σ = 6189949082. Its totient is φ = 6189949080.

The previous prime is 6189949061. The next prime is 6189949121. The reversal of 6189949081 is 1809499816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5414605056 + 775344025 = 73584^2 + 27845^2 .

It is a cyclic number.

It is not a de Polignac number, because 6189949081 - 2⁵ = 6189949049 is a prime.

It is a super-2 number, since 2×6189949081² = 76630939250745489122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6189949061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3094974540 + 3094974541.

It is an arithmetic number, because the mean of its divisors is an integer number (3094974541).

Almost surely, 2^6189949081 is an apocalyptic number.

It is an amenable number.

6189949081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6189949081 is an equidigital number, since it uses as much as digits as its factorization.

6189949081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 6189949081 is about 78676.2294533743. The cubic root of 6189949081 is about 1836.0973008217.

The spelling of 6189949081 in words is "six billion, one hundred eighty-nine million, nine hundred forty-nine thousand, eighty-one".