646232154 has 16 divisors (see below), whose sum is σ = 1297496448. Its totient is φ = 214572032.

The previous prime is 646232141. The next prime is 646232177. The reversal of 646232154 is 451232646.

It is an unprimeable number.

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, 208002 + ... + 211085.

It is an arithmetic number, because the mean of its divisors is an integer number (81093528).

Almost surely, 2^646232154 is an apocalyptic number.

646232154 is an abundant number, since it is smaller than the sum of its proper divisors (651264294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646232154 is a wasteful number, since it uses less digits than its factorization.

646232154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419349.

The product of its digits is 34560, while the sum is 33.

The square root of 646232154 is about 25421.0966325216. The cubic root of 646232154 is about 864.5620886990.

The spelling of 646232154 in words is "six hundred forty-six million, two hundred thirty-two thousand, one hundred fifty-four".