2641881256 has 72 divisors (see below), whose sum is σ = 5954991210. Its totient is φ = 1095554880.

The previous prime is 2641881197. The next prime is 2641881259. The reversal of 2641881256 is 6521881462.

It can be written as a sum of positive squares in only one way, i.e., 1846077156 + 795804100 = 42966^2 + 28210^2 .

It is not an unprimeable number, because it can be changed into a prime (2641881259) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 373206 + ... + 380218.

Almost surely, 2^2641881256 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 2641881256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2977495605).

2641881256 is an abundant number, since it is smaller than the sum of its proper divisors (3313109954).

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

2641881256 is a wasteful number, since it uses less digits than its factorization.

2641881256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095 (or 7053 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 2641881256 is about 51399.2340020744. The cubic root of 2641881256 is about 1382.4128578305.

The spelling of 2641881256 in words is "two billion, six hundred forty-one million, eight hundred eighty-one thousand, two hundred fifty-six".