646161088 has 28 divisors (see below), whose sum is σ = 1284859000. Its totient is φ = 322417152.

The previous prime is 646161083. The next prime is 646161091. The reversal of 646161088 is 880161646.

It is a self number, because there is not a number n which added to its sum of digits gives 646161088.

It is not an unprimeable number, because it can be changed into a prime (646161083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21820 + ... + 42052.

Almost surely, 2^646161088 is an apocalyptic number.

It is an amenable number.

646161088 is a deficient number, since it is larger than the sum of its proper divisors (638697912).

646161088 is a wasteful number, since it uses less digits than its factorization.

646161088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20744 (or 20734 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 646161088 is about 25419.6988180427. The cubic root of 646161088 is about 864.5303956398.

The spelling of 646161088 in words is "six hundred forty-six million, one hundred sixty-one thousand, eighty-eight".