645203186952 has 32 divisors (see below), whose sum is σ = 1616857653600. Its totient is φ = 214554437504.

The previous prime is 645203186951. The next prime is 645203187037. The reversal of 645203186952 is 259681302546.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 645203186895 and 645203186904.

It is not an unprimeable number, because it can be changed into a prime (645203186951) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32070453 + ... + 32090564.

It is an arithmetic number, because the mean of its divisors is an integer number (50526801675).

Almost surely, 2^645203186952 is an apocalyptic number.

It is an amenable number.

645203186952 is an abundant number, since it is smaller than the sum of its proper divisors (971654466648).

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

645203186952 is a wasteful number, since it uses less digits than its factorization.

645203186952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64161445 (or 64161441 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 645203186952 in words is "six hundred forty-five billion, two hundred three million, one hundred eighty-six thousand, nine hundred fifty-two".