645027160 has 32 divisors (see below), whose sum is σ = 1453788000. Its totient is φ = 257570560.

The previous prime is 645027041. The next prime is 645027161. The reversal of 645027160 is 61720546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645027161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10500 + ... + 37420.

It is an arithmetic number, because the mean of its divisors is an integer number (45430875).

Almost surely, 2^645027160 is an apocalyptic number.

It is an amenable number.

645027160 is an abundant number, since it is smaller than the sum of its proper divisors (808760840).

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

645027160 is a wasteful number, since it uses less digits than its factorization.

645027160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27531 (or 27527 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 645027160 is about 25397.3849047495. The cubic root of 645027160 is about 864.0243870288.

The spelling of 645027160 in words is "six hundred forty-five million, twenty-seven thousand, one hundred sixty".