2131068644 has 12 divisors (see below), whose sum is σ = 3820330668. Its totient is φ = 1039545600.

The previous prime is 2131068637. The next prime is 2131068647. The reversal of 2131068644 is 4468601312.

It can be written as a sum of positive squares in 2 ways, for example, as 969076900 + 1161991744 = 31130^2 + 34088^2 .

It is not an unprimeable number, because it can be changed into a prime (2131068647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6496997 + ... + 6497324.

It is an arithmetic number, because the mean of its divisors is an integer number (318360889).

Almost surely, 2^2131068644 is an apocalyptic number.

It is an amenable number.

2131068644 is a deficient number, since it is larger than the sum of its proper divisors (1689262024).

2131068644 is a wasteful number, since it uses less digits than its factorization.

2131068644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12994366 (or 12994364 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 2131068644 is about 46163.4990441583. The cubic root of 2131068644 is about 1286.8634903723.

Adding to 2131068644 its reverse (4468601312), we get a palindrome (6599669956).

The spelling of 2131068644 in words is "two billion, one hundred thirty-one million, sixty-eight thousand, six hundred forty-four".