645084175 has 6 divisors (see below), whose sum is σ = 799904408. Its totient is φ = 516067320.

The previous prime is 645084173. The next prime is 645084179. The reversal of 645084175 is 571480546.

645084175 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645084175 - 2¹ = 645084173 is a prime.

It is a super-2 number, since 2×645084175² = 832267185670861250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645084173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12901659 + ... + 12901708.

Almost surely, 2^645084175 is an apocalyptic number.

645084175 is a deficient number, since it is larger than the sum of its proper divisors (154820233).

645084175 is a wasteful number, since it uses less digits than its factorization.

645084175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25803377 (or 25803372 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 645084175 is about 25398.5073380307. The cubic root of 645084175 is about 864.0498437859.

The spelling of 645084175 in words is "six hundred forty-five million, eighty-four thousand, one hundred seventy-five".