645344400305611 has 8 divisors (see below), whose sum is σ = 669096595805184. Its totient is φ = 621775619443560.

The previous prime is 645344400305569. The next prime is 645344400305687. The reversal of 645344400305611 is 116503004443546.

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 645344400305611 - 2²⁷ = 645344266087883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645344400303611) 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, 45853652215 + ... + 45853666288.

It is an arithmetic number, because the mean of its divisors is an integer number (83637074475648).

Almost surely, 2^{645344400305611} is an apocalyptic number.

645344400305611 is a deficient number, since it is larger than the sum of its proper divisors (23752195499573).

645344400305611 is a wasteful number, since it uses less digits than its factorization.

645344400305611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91707318761.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 645344400305611 in words is "six hundred forty-five trillion, three hundred forty-four billion, four hundred million, three hundred five thousand, six hundred eleven".