645414666364 has 12 divisors (see below), whose sum is σ = 1216358409784. Its totient is φ = 297883692144.

The previous prime is 645414666293. The next prime is 645414666367. The reversal of 645414666364 is 463666414546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645414666367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6205910202 + ... + 6205910305.

Almost surely, 2^645414666364 is an apocalyptic number.

It is an amenable number.

645414666364 is a deficient number, since it is larger than the sum of its proper divisors (570943743420).

645414666364 is a wasteful number, since it uses less digits than its factorization.

645414666364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411820524 (or 12411820522 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 55.

The spelling of 645414666364 in words is "six hundred forty-five billion, four hundred fourteen million, six hundred sixty-six thousand, three hundred sixty-four".