640717144501322 has 16 divisors (see below), whose sum is σ = 1098560939188992. Its totient is φ = 274545889061040.

The previous prime is 640717144501321. The next prime is 640717144501457. The reversal of 640717144501322 is 223105441717046.

It is not an unprimeable number, because it can be changed into a prime (640717144501321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3930987938 + ... + 3931150925.

It is an arithmetic number, because the mean of its divisors is an integer number (68660058699312).

Almost surely, 2^{640717144501322} is an apocalyptic number.

640717144501322 is a deficient number, since it is larger than the sum of its proper divisors (457843794687670).

640717144501322 is a wasteful number, since it uses less digits than its factorization.

640717144501322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862144693.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 640717144501322 in words is "six hundred forty trillion, seven hundred seventeen billion, one hundred forty-four million, five hundred one thousand, three hundred twenty-two".