645174297852 has 24 divisors (see below), whose sum is σ = 1720464794496. Its totient is φ = 184335513648.

The previous prime is 645174297851. The next prime is 645174297881. The reversal of 645174297852 is 258792471546.

645174297852 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645174297851) 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, 3840323118 + ... + 3840323285.

It is an arithmetic number, because the mean of its divisors is an integer number (71686033104).

Almost surely, 2^645174297852 is an apocalyptic number.

It is an amenable number.

645174297852 is an abundant number, since it is smaller than the sum of its proper divisors (1075290496644).

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

645174297852 is a wasteful number, since it uses less digits than its factorization.

645174297852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680646417 (or 7680646415 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 60.

The spelling of 645174297852 in words is "six hundred forty-five billion, one hundred seventy-four million, two hundred ninety-seven thousand, eight hundred fifty-two".