645085085 has 8 divisors (see below), whose sum is σ = 777047040. Its totient is φ = 514104784.

The previous prime is 645085073. The next prime is 645085087. The reversal of 645085085 is 580580546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645085085 - 2⁴ = 645085069 is a prime.

It is a super-2 number, since 2×645085085² = 832269533778914450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645085087) 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, 243965 + ... + 246594.

It is an arithmetic number, because the mean of its divisors is an integer number (97130880).

Almost surely, 2^645085085 is an apocalyptic number.

It is an amenable number.

645085085 is a deficient number, since it is larger than the sum of its proper divisors (131961955).

645085085 is a wasteful number, since it uses less digits than its factorization.

645085085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490827.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 645085085 is about 25398.5252524630. The cubic root of 645085085 is about 864.0502500817.

The spelling of 645085085 in words is "six hundred forty-five million, eighty-five thousand, eighty-five".