646085875 has 8 divisors (see below), whose sum is σ = 806315328. Its totient is φ = 516868600.

The previous prime is 646085873. The next prime is 646085917. The reversal of 646085875 is 578580646.

It is not a de Polignac number, because 646085875 - 2¹ = 646085873 is a prime.

It is a super-3 number, since 3×646085875³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646085873) 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, 2584219 + ... + 2584468.

It is an arithmetic number, because the mean of its divisors is an integer number (100789416).

Almost surely, 2^646085875 is an apocalyptic number.

646085875 is a deficient number, since it is larger than the sum of its proper divisors (160229453).

646085875 is an equidigital number, since it uses as much as digits as its factorization.

646085875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168702 (or 5168692 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The square root of 646085875 is about 25418.2193514809. The cubic root of 646085875 is about 864.4968506260.

The spelling of 646085875 in words is "six hundred forty-six million, eighty-five thousand, eight hundred seventy-five".