646146863 has 8 divisors (see below), whose sum is σ = 684382608. Its totient is φ = 607936384.

The previous prime is 646146859. The next prime is 646146887. The reversal of 646146863 is 368641646.

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 646146863 - 2² = 646146859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646146803) 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, 80720 + ... + 88362.

It is an arithmetic number, because the mean of its divisors is an integer number (85547826).

Almost surely, 2^646146863 is an apocalyptic number.

646146863 is a deficient number, since it is larger than the sum of its proper divisors (38235745).

646146863 is a wasteful number, since it uses less digits than its factorization.

646146863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633.

The product of its digits is 497664, while the sum is 44.

The square root of 646146863 is about 25419.4190138170. The cubic root of 646146863 is about 864.5240514864.

The spelling of 646146863 in words is "six hundred forty-six million, one hundred forty-six thousand, eight hundred sixty-three".