645118364017 has 8 divisors (see below), whose sum is σ = 665943310080. Its totient is φ = 624294335280.

The previous prime is 645118363997. The next prime is 645118364027. The reversal of 645118364017 is 710463811546.

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-645118364017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645118364027) 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, 1379043 + ... + 1786615.

It is an arithmetic number, because the mean of its divisors is an integer number (83242913760).

Almost surely, 2^645118364017 is an apocalyptic number.

It is an amenable number.

645118364017 is a deficient number, since it is larger than the sum of its proper divisors (20824946063).

645118364017 is a wasteful number, since it uses less digits than its factorization.

645118364017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458663.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 645118364017 in words is "six hundred forty-five billion, one hundred eighteen million, three hundred sixty-four thousand, seventeen".