2582738644 has 6 divisors (see below), whose sum is σ = 4519792634. Its totient is φ = 1291369320.

The previous prime is 2582738633. The next prime is 2582738677. The reversal of 2582738644 is 4468372852.

It can be written as a sum of positive squares in only one way, i.e., 2574547600 + 8191044 = 50740^2 + 2862^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322842327 + ... + 322842334.

Almost surely, 2^2582738644 is an apocalyptic number.

It is an amenable number.

2582738644 is a deficient number, since it is larger than the sum of its proper divisors (1937053990).

2582738644 is a wasteful number, since it uses less digits than its factorization.

2582738644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645684665 (or 645684663 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 49.

The square root of 2582738644 is about 50820.6517470998. The cubic root of 2582738644 is about 1372.0190882945.

The spelling of 2582738644 in words is "two billion, five hundred eighty-two million, seven hundred thirty-eight thousand, six hundred forty-four".