646263315 has 48 divisors (see below), whose sum is σ = 1183133952. Its totient is φ = 325672512.

The previous prime is 646263311. The next prime is 646263323. The reversal of 646263315 is 513362646.

646263315 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 633 + 15 = 666.

It is not a de Polignac number, because 646263315 - 2² = 646263311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646263315.

It is not an unprimeable number, because it can be changed into a prime (646263311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82144 + ... + 89666.

It is an arithmetic number, because the mean of its divisors is an integer number (24648624).

Almost surely, 2^646263315 is an apocalyptic number.

646263315 is a deficient number, since it is larger than the sum of its proper divisors (536870637).

646263315 is a wasteful number, since it uses less digits than its factorization.

646263315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7640 (or 7637 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 646263315 is about 25421.7095215880. The cubic root of 646263315 is about 864.5759847300.

The spelling of 646263315 in words is "six hundred forty-six million, two hundred sixty-three thousand, three hundred fifteen".