646463057 has 8 divisors (see below), whose sum is σ = 668424960. Its totient is φ = 624570480.

The previous prime is 646463033. The next prime is 646463071. The reversal of 646463057 is 750364646.

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 646463057 - 2⁸ = 646462801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646463017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994 + ... + 36012.

It is an arithmetic number, because the mean of its divisors is an integer number (83553120).

Almost surely, 2^646463057 is an apocalyptic number.

It is an amenable number.

646463057 is a deficient number, since it is larger than the sum of its proper divisors (21961903).

646463057 is a wasteful number, since it uses less digits than its factorization.

646463057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34663.

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 646463057 is about 25425.6377894439. The cubic root of 646463057 is about 864.6650476780.

The spelling of 646463057 in words is "six hundred forty-six million, four hundred sixty-three thousand, fifty-seven".