645414341256 has 48 divisors (see below), whose sum is σ = 1755499353660. Its totient is φ = 214214768640.

The previous prime is 645414341251. The next prime is 645414341267. The reversal of 645414341256 is 652143414546.

645414341256 is a `hidden beast` number, since 6 + 4 + 54 + 1 + 4 + 341 + 256 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 642225932100 + 3188409156 = 801390^2 + 56466^2 .

It is not an unprimeable number, because it can be changed into a prime (645414341251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19219465 + ... + 19253016.

Almost surely, 2^645414341256 is an apocalyptic number.

It is an amenable number.

645414341256 is an abundant number, since it is smaller than the sum of its proper divisors (1110085012404).

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

645414341256 is a wasteful number, since it uses less digits than its factorization.

645414341256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38472726 (or 38472719 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 645414341256 in words is "six hundred forty-five billion, four hundred fourteen million, three hundred forty-one thousand, two hundred fifty-six".