640105623302 has 8 divisors (see below), whose sum is σ = 1001904453936. Its totient is φ = 306137471992.

The previous prime is 640105623301. The next prime is 640105623319. The reversal of 640105623302 is 203326501046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640105623301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6957669773 + ... + 6957669864.

It is an arithmetic number, because the mean of its divisors is an integer number (125238056742).

Almost surely, 2^640105623302 is an apocalyptic number.

640105623302 is a deficient number, since it is larger than the sum of its proper divisors (361798830634).

640105623302 is a wasteful number, since it uses less digits than its factorization.

640105623302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13915339662.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 640105623302 in words is "six hundred forty billion, one hundred five million, six hundred twenty-three thousand, three hundred two".