645479599205 has 48 divisors (see below), whose sum is σ = 931172691456. Its totient is φ = 427843866240.

The previous prime is 645479599189. The next prime is 645479599309. The reversal of 645479599205 is 502995974546.

It is not a de Polignac number, because 645479599205 - 2⁴ = 645479599189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6612362 + ... + 6709268.

It is an arithmetic number, because the mean of its divisors is an integer number (19399431072).

Almost surely, 2^645479599205 is an apocalyptic number.

It is an amenable number.

645479599205 is a deficient number, since it is larger than the sum of its proper divisors (285693092251).

645479599205 is a wasteful number, since it uses less digits than its factorization.

645479599205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97834 (or 97827 counting only the distinct ones).

The product of its (nonzero) digits is 122472000, while the sum is 65.

The spelling of 645479599205 in words is "six hundred forty-five billion, four hundred seventy-nine million, five hundred ninety-nine thousand, two hundred five".