646820310275 has 24 divisors (see below), whose sum is σ = 844324047600. Its totient is φ = 490190745600.

The previous prime is 646820310263. The next prime is 646820310281. The reversal of 646820310275 is 572013028646.

It is not a de Polignac number, because 646820310275 - 2¹⁴ = 646820293891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9904931 + ... + 9970019.

It is an arithmetic number, because the mean of its divisors is an integer number (35180168650).

Almost surely, 2^646820310275 is an apocalyptic number.

646820310275 is a deficient number, since it is larger than the sum of its proper divisors (197503737325).

646820310275 is a wasteful number, since it uses less digits than its factorization.

646820310275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86039 (or 86034 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 646820310275 in words is "six hundred forty-six billion, eight hundred twenty million, three hundred ten thousand, two hundred seventy-five".