645246206445 has 32 divisors (see below), whose sum is σ = 1090597956480. Its totient is φ = 324858885120.

The previous prime is 645246206399. The next prime is 645246206453. The reversal of 645246206445 is 544602642546.

It is a happy number.

It is not a de Polignac number, because 645246206445 - 2⁷ = 645246206317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645246206394 and 645246206403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3948424 + ... + 4108593.

It is an arithmetic number, because the mean of its divisors is an integer number (34081186140).

Almost surely, 2^645246206445 is an apocalyptic number.

It is an amenable number.

645246206445 is a deficient number, since it is larger than the sum of its proper divisors (445351750035).

645246206445 is a wasteful number, since it uses less digits than its factorization.

645246206445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057325.

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 645246206445 in words is "six hundred forty-five billion, two hundred forty-six million, two hundred six thousand, four hundred forty-five".