640282366616399 has 8 divisors (see below), whose sum is σ = 689600110110240. Its totient is φ = 590973945087456.

The previous prime is 640282366616377. The next prime is 640282366616507. The reversal of 640282366616399 is 993616663282046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640282366616399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640282366616899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2330348564 + ... + 2330623305.

It is an arithmetic number, because the mean of its divisors is an integer number (86200013763780).

Almost surely, 2^{640282366616399} is an apocalyptic number.

640282366616399 is a deficient number, since it is larger than the sum of its proper divisors (49317743493841).

640282366616399 is a wasteful number, since it uses less digits than its factorization.

640282366616399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660982449.

The product of its (nonzero) digits is 725594112, while the sum is 71.

The spelling of 640282366616399 in words is "six hundred forty trillion, two hundred eighty-two billion, three hundred sixty-six million, six hundred sixteen thousand, three hundred ninety-nine".