646522145 has 8 divisors (see below), whose sum is σ = 779726400. Its totient is φ = 514617840.

The previous prime is 646522069. The next prime is 646522171. The reversal of 646522145 is 541225646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646522145 - 2¹² = 646518049 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323891 + ... + 325880.

It is an arithmetic number, because the mean of its divisors is an integer number (97465800).

Almost surely, 2^646522145 is an apocalyptic number.

It is an amenable number.

646522145 is a deficient number, since it is larger than the sum of its proper divisors (133204255).

646522145 is a wasteful number, since it uses less digits than its factorization.

646522145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649975.

The product of its digits is 57600, while the sum is 35.

The square root of 646522145 is about 25426.7997396448. The cubic root of 646522145 is about 864.6913909063.

The spelling of 646522145 in words is "six hundred forty-six million, five hundred twenty-two thousand, one hundred forty-five".