645755612282 has 24 divisors (see below), whose sum is σ = 1093471825908. Its totient is φ = 285592158720.

The previous prime is 645755612263. The next prime is 645755612309. The reversal of 645755612282 is 282216557546.

It can be written as a sum of positive squares in 2 ways, for example, as 635111769721 + 10643842561 = 796939^2 + 103169^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36050663 + ... + 36068570.

Almost surely, 2^645755612282 is an apocalyptic number.

645755612282 is a deficient number, since it is larger than the sum of its proper divisors (447716213626).

645755612282 is a wasteful number, since it uses less digits than its factorization.

645755612282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72119294 (or 72119283 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 53.

The spelling of 645755612282 in words is "six hundred forty-five billion, seven hundred fifty-five million, six hundred twelve thousand, two hundred eighty-two".