640283327995 has 8 divisors (see below), whose sum is σ = 801746080416. Its totient is φ = 489955937856.

The previous prime is 640283327953. The next prime is 640283328001. The reversal of 640283327995 is 599723382046.

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

It is a cyclic number.

It is not a de Polignac number, because 640283327995 - 2⁹ = 640283327483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2783840442 + ... + 2783840671.

It is an arithmetic number, because the mean of its divisors is an integer number (100218260052).

Almost surely, 2^640283327995 is an apocalyptic number.

640283327995 is a deficient number, since it is larger than the sum of its proper divisors (161462752421).

640283327995 is a wasteful number, since it uses less digits than its factorization.

640283327995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567681141.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 640283327995 in words is "six hundred forty billion, two hundred eighty-three million, three hundred twenty-seven thousand, nine hundred ninety-five".