640153616 has 10 divisors (see below), whose sum is σ = 1240297662. Its totient is φ = 320076800.

The previous prime is 640153607. The next prime is 640153651. The reversal of 640153616 is 616351046.

It can be written as a sum of positive squares in only one way, i.e., 396169216 + 243984400 = 19904^2 + 15620^2 .

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, 20004785 + ... + 20004816.

Almost surely, 2^640153616 is an apocalyptic number.

It is an amenable number.

640153616 is a deficient number, since it is larger than the sum of its proper divisors (600144046).

640153616 is a wasteful number, since it uses less digits than its factorization.

640153616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40009609 (or 40009603 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 640153616 is about 25301.2572019653. The cubic root of 640153616 is about 861.8428195885.

The spelling of 640153616 in words is "six hundred forty million, one hundred fifty-three thousand, six hundred sixteen".