6403426641 has 6 divisors (see below), whose sum is σ = 9249394050. Its totient is φ = 4268951088.

The previous prime is 6403426633. The next prime is 6403426651. The reversal of 6403426641 is 1466243046.

6403426641 is a `hidden beast` number, since 6 + 4 + 0 + 3 + 4 + 2 + 6 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4289726016 + 2113700625 = 65496^2 + 45975^2 .

It is not a de Polignac number, because 6403426641 - 2³ = 6403426633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6403426596 and 6403426605.

It is not an unprimeable number, because it can be changed into a prime (6403426621) 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 in 5 ways as a sum of consecutive naturals, for example, 355745916 + ... + 355745933.

It is an arithmetic number, because the mean of its divisors is an integer number (1541565675).

Almost surely, 2^6403426641 is an apocalyptic number.

It is an amenable number.

6403426641 is a deficient number, since it is larger than the sum of its proper divisors (2845967409).

6403426641 is a wasteful number, since it uses less digits than its factorization.

6403426641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711491855 (or 711491852 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6403426641 is about 80021.4136403500. The cubic root of 6403426641 is about 1856.9668297130.

Adding to 6403426641 its reverse (1466243046), we get a palindrome (7869669687).

The spelling of 6403426641 in words is "six billion, four hundred three million, four hundred twenty-six thousand, six hundred forty-one".