2025644656 has 80 divisors (see below), whose sum is σ = 4902543360. Its totient is φ = 790686720.

The previous prime is 2025644651. The next prime is 2025644669. The reversal of 2025644656 is 6564465202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025644651) 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, 41865 + ... + 76183.

It is an arithmetic number, because the mean of its divisors is an integer number (61281792).

Almost surely, 2^2025644656 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 2025644656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2451271680).

2025644656 is an abundant number, since it is smaller than the sum of its proper divisors (2876898704).

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

2025644656 is a wasteful number, since it uses less digits than its factorization.

2025644656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34382 (or 34376 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The square root of 2025644656 is about 45007.1622744647. The cubic root of 2025644656 is about 1265.2832365305.

The spelling of 2025644656 in words is "two billion, twenty-five million, six hundred forty-four thousand, six hundred fifty-six".