640322553612334 has 16 divisors (see below), whose sum is σ = 960660724764672. Its totient is φ = 320102317167448.

The previous prime is 640322553612319. The next prime is 640322553612349. The reversal of 640322553612334 is 433216355223046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (640322553612319) and next prime (640322553612349).

It is a congruent 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, 249972207 + ... + 252520789.

It is an arithmetic number, because the mean of its divisors is an integer number (60041295297792).

Almost surely, 2^{640322553612334} is an apocalyptic number.

640322553612334 is a deficient number, since it is larger than the sum of its proper divisors (320338171152338).

640322553612334 is a wasteful number, since it uses less digits than its factorization.

640322553612334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571671.

The product of its (nonzero) digits is 9331200, while the sum is 49.

The spelling of 640322553612334 in words is "six hundred forty trillion, three hundred twenty-two billion, five hundred fifty-three million, six hundred twelve thousand, three hundred thirty-four".