645535060 has 24 divisors (see below), whose sum is σ = 1368065160. Its totient is φ = 255844224.

The previous prime is 645535057. The next prime is 645535063. The reversal of 645535060 is 60535546.

It is an interprime number because it is at equal distance from previous prime (645535057) and next prime (645535063).

It can be written as a sum of positive squares in 4 ways, for example, as 46949904 + 598585156 = 6852^2 + 24466^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645535063) 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, 145879 + ... + 150238.

It is an arithmetic number, because the mean of its divisors is an integer number (57002715).

Almost surely, 2^645535060 is an apocalyptic number.

It is an amenable number.

645535060 is an abundant number, since it is smaller than the sum of its proper divisors (722530100).

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

645535060 is a wasteful number, since it uses less digits than its factorization.

645535060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296235 (or 296233 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 645535060 is about 25407.3819981516. The cubic root of 645535060 is about 864.2511076396.

The spelling of 645535060 in words is "six hundred forty-five million, five hundred thirty-five thousand, sixty".