425944656 has 100 divisors (see below), whose sum is σ = 1305393012. Its totient is φ = 133622784.

The previous prime is 425944643. The next prime is 425944669. The reversal of 425944656 is 656449524.

425944656 is a `hidden beast` number, since 4 + 2 + 594 + 4 + 6 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (425944643) and next prime (425944669).

It can be written as a sum of positive squares in 2 ways, for example, as 370947600 + 54997056 = 19260^2 + 7416^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12366 + ... + 31698.

Almost surely, 2^425944656 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 425944656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652696506).

425944656 is an abundant number, since it is smaller than the sum of its proper divisors (879448356).

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

425944656 is a wasteful number, since it uses less digits than its factorization.

425944656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19370 (or 19355 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 425944656 is about 20638.4266842218. The cubic root of 425944656 is about 752.4039345658.

The spelling of 425944656 in words is "four hundred twenty-five million, nine hundred forty-four thousand, six hundred fifty-six".