6255555491 has 2 divisors, whose sum is σ = 6255555492. Its totient is φ = 6255555490.

The previous prime is 6255555487. The next prime is 6255555529. The reversal of 6255555491 is 1945555526.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6255555491 - 2² = 6255555487 is a prime.

It is not a weakly prime, because it can be changed into another prime (6255555431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3127777745 + 3127777746.

It is an arithmetic number, because the mean of its divisors is an integer number (3127777746).

Almost surely, 2^6255555491 is an apocalyptic number.

6255555491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6255555491 is an equidigital number, since it uses as much as digits as its factorization.

6255555491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350000, while the sum is 47.

The square root of 6255555491 is about 79092.0697099273. The cubic root of 6255555491 is about 1842.5613637927.

The spelling of 6255555491 in words is "six billion, two hundred fifty-five million, five hundred fifty-five thousand, four hundred ninety-one".