645414666340 has 48 divisors (see below), whose sum is σ = 1364052957120. Its totient is φ = 256512977280.

The previous prime is 645414666293. The next prime is 645414666367. The reversal of 645414666340 is 43666414546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13077310 + ... + 13126570.

It is an arithmetic number, because the mean of its divisors is an integer number (28417769940).

Almost surely, 2^645414666340 is an apocalyptic number.

It is an amenable number.

645414666340 is an abundant number, since it is smaller than the sum of its proper divisors (718638290780).

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

645414666340 is a wasteful number, since it uses less digits than its factorization.

645414666340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53452 (or 53450 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 645414666340 in words is "six hundred forty-five billion, four hundred fourteen million, six hundred sixty-six thousand, three hundred forty".