6427428641 has 2 divisors, whose sum is σ = 6427428642. Its totient is φ = 6427428640.

The previous prime is 6427428613. The next prime is 6427428713. The reversal of 6427428641 is 1468247246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6285318400 + 142110241 = 79280^2 + 11921^2 .

It is a cyclic number.

It is not a de Polignac number, because 6427428641 - 2³⁰ = 5353686817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6427428592 and 6427428601.

It is not a weakly prime, because it can be changed into another prime (6427428041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213714320 + 3213714321.

It is an arithmetic number, because the mean of its divisors is an integer number (3213714321).

Almost surely, 2^6427428641 is an apocalyptic number.

It is an amenable number.

6427428641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6427428641 is an equidigital number, since it uses as much as digits as its factorization.

6427428641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 44.

The square root of 6427428641 is about 80171.2457243867. The cubic root of 6427428641 is about 1859.2840965736.

The spelling of 6427428641 in words is "six billion, four hundred twenty-seven million, four hundred twenty-eight thousand, six hundred forty-one".