646460033 has 4 divisors (see below), whose sum is σ = 652736448. Its totient is φ = 640183620.

The previous prime is 646459973. The next prime is 646460051. The reversal of 646460033 is 330064646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646460033 is a prime.

It is a super-2 number, since 2×646460033² = 835821148532722178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646460053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138053 + ... + 3138258.

It is an arithmetic number, because the mean of its divisors is an integer number (163184112).

Almost surely, 2^646460033 is an apocalyptic number.

It is an amenable number.

646460033 is a deficient number, since it is larger than the sum of its proper divisors (6276415).

646460033 is a wasteful number, since it uses less digits than its factorization.

646460033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276414.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 646460033 is about 25425.5783218396. The cubic root of 646460033 is about 864.6636994436.

The spelling of 646460033 in words is "six hundred forty-six million, four hundred sixty thousand, thirty-three".