6424646425 has 6 divisors (see below), whose sum is σ = 7966561598. Its totient is φ = 5139717120.

The previous prime is 6424646407. The next prime is 6424646483. The reversal of 6424646425 is 5246464246.

It can be written as a sum of positive squares in 3 ways, for example, as 1592728281 + 4831918144 = 39909^2 + 69512^2 .

It is not a de Polignac number, because 6424646425 - 2²⁹ = 5887775513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128492904 + ... + 128492953.

Almost surely, 2^6424646425 is an apocalyptic number.

It is an amenable number.

6424646425 is a deficient number, since it is larger than the sum of its proper divisors (1541915173).

6424646425 is a wasteful number, since it uses less digits than its factorization.

6424646425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256985867 (or 256985862 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 43.

The square root of 6424646425 is about 80153.8921388101. The cubic root of 6424646425 is about 1859.0157841672.

The spelling of 6424646425 in words is "six billion, four hundred twenty-four million, six hundred forty-six thousand, four hundred twenty-five".