640314530655 has 8 divisors (see below), whose sum is σ = 1024503249072. Its totient is φ = 341501083008.

The previous prime is 640314530633. The next prime is 640314530677. The reversal of 640314530655 is 556035413046.

It is an interprime number because it is at equal distance from previous prime (640314530633) and next prime (640314530677).

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

It is not a de Polignac number, because 640314530655 - 2⁸ = 640314530399 is a prime.

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, 21343817674 + ... + 21343817703.

It is an arithmetic number, because the mean of its divisors is an integer number (128062906134).

Almost surely, 2^640314530655 is an apocalyptic number.

640314530655 is a deficient number, since it is larger than the sum of its proper divisors (384188718417).

640314530655 is a wasteful number, since it uses less digits than its factorization.

640314530655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42687635385.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 640314530655 in words is "six hundred forty billion, three hundred fourteen million, five hundred thirty thousand, six hundred fifty-five".