6426694656 has 176 divisors, whose sum is σ = 19148129280. Its totient is φ = 2129264640.

The previous prime is 6426694639. The next prime is 6426694657. The reversal of 6426694656 is 6564966246.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426694657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5280160 + ... + 5281376.

Almost surely, 2^6426694656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6426694656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9574064640).

6426694656 is an abundant number, since it is smaller than the sum of its proper divisors (12721434624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6426694656 is a wasteful number, since it uses less digits than its factorization.

6426694656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437 (or 1413 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The square root of 6426694656 is about 80166.6679861400. The cubic root of 6426694656 is about 1859.2133197687.

The spelling of 6426694656 in words is "six billion, four hundred twenty-six million, six hundred ninety-four thousand, six hundred fifty-six".