6425664436 has 12 divisors (see below), whose sum is σ = 11403292320. Its totient is φ = 3167580920.

The previous prime is 6425664433. The next prime is 6425664461. The reversal of 6425664436 is 6344665246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425664433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11312506 + ... + 11313073.

It is an arithmetic number, because the mean of its divisors is an integer number (950274360).

Almost surely, 2^6425664436 is an apocalyptic number.

It is an amenable number.

6425664436 is a deficient number, since it is larger than the sum of its proper divisors (4977627884).

6425664436 is a wasteful number, since it uses less digits than its factorization.

6425664436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22625654 (or 22625652 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 46.

The square root of 6425664436 is about 80160.2422401529. The cubic root of 6425664436 is about 1859.1139684844.

The spelling of 6425664436 in words is "six billion, four hundred twenty-five million, six hundred sixty-four thousand, four hundred thirty-six".