6581738452 has 6 divisors (see below), whose sum is σ = 11518042298. Its totient is φ = 3290869224.

The previous prime is 6581738441. The next prime is 6581738459. The reversal of 6581738452 is 2548371856.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4238791236 + 2342947216 = 65106^2 + 48404^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6581738396 and 6581738405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6581738459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822717303 + ... + 822717310.

Almost surely, 2^6581738452 is an apocalyptic number.

It is an amenable number.

6581738452 is a deficient number, since it is larger than the sum of its proper divisors (4936303846).

6581738452 is a wasteful number, since it uses less digits than its factorization.

6581738452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645434617 (or 1645434615 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The square root of 6581738452 is about 81127.9141356414. The cubic root of 6581738452 is about 1874.0458269970.

The spelling of 6581738452 in words is "six billion, five hundred eighty-one million, seven hundred thirty-eight thousand, four hundred fifty-two".