6445426685 has 8 divisors (see below), whose sum is σ = 7781964000. Its totient is φ = 5124706704.

The previous prime is 6445426681. The next prime is 6445426727. The reversal of 6445426685 is 5866245446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6445426685 - 2² = 6445426681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445426681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3953435 + ... + 3955064.

It is an arithmetic number, because the mean of its divisors is an integer number (972745500).

Almost surely, 2^6445426685 is an apocalyptic number.

It is an amenable number.

6445426685 is a deficient number, since it is larger than the sum of its proper divisors (1336537315).

6445426685 is a wasteful number, since it uses less digits than its factorization.

6445426685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7908667.

The product of its digits is 5529600, while the sum is 50.

The square root of 6445426685 is about 80283.4147567229. The cubic root of 6445426685 is about 1861.0179309787.

The spelling of 6445426685 in words is "six billion, four hundred forty-five million, four hundred twenty-six thousand, six hundred eighty-five".