645425435320 has 64 divisors (see below), whose sum is σ = 1470876913440. Its totient is φ = 254871552000.

The previous prime is 645425435311. The next prime is 645425435329. The reversal of 645425435320 is 23534524546.

It is an interprime number because it is at equal distance from previous prime (645425435311) and next prime (645425435329).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645425435329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692220 + ... + 1330420.

Almost surely, 2^645425435320 is an apocalyptic number.

It is an amenable number.

645425435320 is an abundant number, since it is smaller than the sum of its proper divisors (825451478120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645425435320 is a wasteful number, since it uses less digits than its factorization.

645425435320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638536 (or 638532 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 645425435320 its reverse (23534524546), we get a palindrome (668959959866).

The spelling of 645425435320 in words is "six hundred forty-five billion, four hundred twenty-five million, four hundred thirty-five thousand, three hundred twenty".