640250162 has 4 divisors (see below), whose sum is σ = 960375246. Its totient is φ = 320125080.

The previous prime is 640250159. The next prime is 640250189. The reversal of 640250162 is 261052046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 261052046 = 2 ⋅130526023.

It can be written as a sum of positive squares in only one way, i.e., 640140601 + 109561 = 25301^2 + 331^2 .

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 as a sum of consecutive naturals, namely, 160062539 + ... + 160062542.

Almost surely, 2^640250162 is an apocalyptic number.

640250162 is a deficient number, since it is larger than the sum of its proper divisors (320125084).

640250162 is a wasteful number, since it uses less digits than its factorization.

640250162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320125083.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 640250162 is about 25303.1650589407. The cubic root of 640250162 is about 861.8861442386.

The spelling of 640250162 in words is "six hundred forty million, two hundred fifty thousand, one hundred sixty-two".