645525411364 has 6 divisors (see below), whose sum is σ = 1129669469894. Its totient is φ = 322762705680.

The previous prime is 645525411361. The next prime is 645525411371. The reversal of 645525411364 is 463114525546.

It can be written as a sum of positive squares in only one way, i.e., 418751352100 + 226774059264 = 647110^2 + 476208^2 .

It is a super-2 number, since 2×645525411364² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645525411361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80690676417 + ... + 80690676424.

Almost surely, 2^645525411364 is an apocalyptic number.

It is an amenable number.

645525411364 is a deficient number, since it is larger than the sum of its proper divisors (484144058530).

645525411364 is a wasteful number, since it uses less digits than its factorization.

645525411364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161381352845 (or 161381352843 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 46.

The spelling of 645525411364 in words is "six hundred forty-five billion, five hundred twenty-five million, four hundred eleven thousand, three hundred sixty-four".