645270787583 has 2 divisors, whose sum is σ = 645270787584. Its totient is φ = 645270787582.

The previous prime is 645270787573. The next prime is 645270787589. The reversal of 645270787583 is 385787072546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645270787583 - 2⁸ = 645270787327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645270787589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322635393791 + 322635393792.

It is an arithmetic number, because the mean of its divisors is an integer number (322635393792).

Almost surely, 2^645270787583 is an apocalyptic number.

645270787583 is a deficient number, since it is larger than the sum of its proper divisors (1).

645270787583 is an equidigital number, since it uses as much as digits as its factorization.

645270787583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79027200, while the sum is 62.

The spelling of 645270787583 in words is "six hundred forty-five billion, two hundred seventy million, seven hundred eighty-seven thousand, five hundred eighty-three".