640162148 has 12 divisors (see below), whose sum is σ = 1121485932. Its totient is φ = 319737600.

The previous prime is 640162109. The next prime is 640162177. The reversal of 640162148 is 841261046.

It can be written as a sum of positive squares in 2 ways, for example, as 238640704 + 401521444 = 15448^2 + 20038^2 .

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 3 ways as a sum of consecutive naturals, for example, 81653 + ... + 89148.

It is an arithmetic number, because the mean of its divisors is an integer number (93457161).

Almost surely, 2^640162148 is an apocalyptic number.

It is an amenable number.

640162148 is a deficient number, since it is larger than the sum of its proper divisors (481323784).

640162148 is a wasteful number, since it uses less digits than its factorization.

640162148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171742 (or 171740 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 640162148 is about 25301.4258096258. The cubic root of 640162148 is about 861.8466484665.

The spelling of 640162148 in words is "six hundred forty million, one hundred sixty-two thousand, one hundred forty-eight".