646055275 has 6 divisors (see below), whose sum is σ = 801108572. Its totient is φ = 516844200.

The previous prime is 646055219. The next prime is 646055281. The reversal of 646055275 is 572550646.

It is not a de Polignac number, because 646055275 - 2²⁵ = 612500843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12921081 + ... + 12921130.

Almost surely, 2^646055275 is an apocalyptic number.

646055275 is a deficient number, since it is larger than the sum of its proper divisors (155053297).

646055275 is a wasteful number, since it uses less digits than its factorization.

646055275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25842221 (or 25842216 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 646055275 is about 25417.6174139119. The cubic root of 646055275 is about 864.4832022746.

The spelling of 646055275 in words is "six hundred forty-six million, fifty-five thousand, two hundred seventy-five".