645401167852 has 12 divisors (see below), whose sum is σ = 1290802335760. Its totient is φ = 276600500496.

The previous prime is 645401167811. The next prime is 645401167871. The reversal of 645401167852 is 258761104546.

645401167852 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 645401167796 and 645401167805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11525020827 + ... + 11525020882.

Almost surely, 2^645401167852 is an apocalyptic number.

It is an amenable number.

645401167852 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645401167852 is a wasteful number, since it uses less digits than its factorization.

645401167852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23050041720 (or 23050041718 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 645401167852 in words is "six hundred forty-five billion, four hundred one million, one hundred sixty-seven thousand, eight hundred fifty-two".