646229564073 has 48 divisors (see below), whose sum is σ = 1026337840000. Its totient is φ = 401756868864.

The previous prime is 646229564053. The next prime is 646229564161. The reversal of 646229564073 is 370465922646.

646229564073 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 2 + 9 + 564 + 0 + 73 = 666.

It is not a de Polignac number, because 646229564073 - 2¹⁸ = 646229301929 is a prime.

It is a super-2 number, since 2×646229564073² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646229564053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 470628 + ... + 1230426.

Almost surely, 2^646229564073 is an apocalyptic number.

It is an amenable number.

646229564073 is a deficient number, since it is larger than the sum of its proper divisors (380108275927).

646229564073 is a wasteful number, since it uses less digits than its factorization.

646229564073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759951 (or 759928 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 646229564073 in words is "six hundred forty-six billion, two hundred twenty-nine million, five hundred sixty-four thousand, seventy-three".