6445782137 has 2 divisors, whose sum is σ = 6445782138. Its totient is φ = 6445782136.

The previous prime is 6445782107. The next prime is 6445782163. The reversal of 6445782137 is 7312875446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5999896681 + 445885456 = 77459^2 + 21116^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445782137 - 2¹² = 6445778041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6445782091 and 6445782100.

It is not a weakly prime, because it can be changed into another prime (6445782107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222891068 + 3222891069.

It is an arithmetic number, because the mean of its divisors is an integer number (3222891069).

Almost surely, 2^6445782137 is an apocalyptic number.

It is an amenable number.

6445782137 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445782137 is an equidigital number, since it uses as much as digits as its factorization.

6445782137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 47.

The square root of 6445782137 is about 80285.6284586476. The cubic root of 6445782137 is about 1861.0521407845.

The spelling of 6445782137 in words is "six billion, four hundred forty-five million, seven hundred eighty-two thousand, one hundred thirty-seven".