645274162205 has 64 divisors (see below), whose sum is σ = 821261500416. Its totient is φ = 486077760000.

The previous prime is 645274162201. The next prime is 645274162207. The reversal of 645274162205 is 502261472546.

645274162205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645274162205 - 2² = 645274162201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645274162201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 274466780 + ... + 274469130.

It is an arithmetic number, because the mean of its divisors is an integer number (12832210944).

Almost surely, 2^645274162205 is an apocalyptic number.

It is an amenable number.

645274162205 is a deficient number, since it is larger than the sum of its proper divisors (175987338211).

645274162205 is a wasteful number, since it uses less digits than its factorization.

645274162205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 645274162205 in words is "six hundred forty-five billion, two hundred seventy-four million, one hundred sixty-two thousand, two hundred five".