6021841781 has 2 divisors, whose sum is σ = 6021841782. Its totient is φ = 6021841780.

The previous prime is 6021841751. The next prime is 6021841823. The reversal of 6021841781 is 1871481206.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5976063025 + 45778756 = 77305^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 6021841781 - 2¹⁰ = 6021840757 is a prime.

It is a super-2 number, since 2×6021841781² = 72525156870794503922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6021841751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3010920890 + 3010920891.

It is an arithmetic number, because the mean of its divisors is an integer number (3010920891).

Almost surely, 2^6021841781 is an apocalyptic number.

It is an amenable number.

6021841781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6021841781 is an equidigital number, since it uses as much as digits as its factorization.

6021841781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 6021841781 is about 77600.5269376439. The cubic root of 6021841781 is about 1819.3228754491.

The spelling of 6021841781 in words is "six billion, twenty-one million, eight hundred forty-one thousand, seven hundred eighty-one".