645344356110 has 32 divisors (see below), whose sum is σ = 1552403452320. Its totient is φ = 171694384128.

The previous prime is 645344356099. The next prime is 645344356147. The reversal of 645344356110 is 11653443546.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 24827055 + ... + 24853034.

It is an arithmetic number, because the mean of its divisors is an integer number (48512607885).

Almost surely, 2^645344356110 is an apocalyptic number.

645344356110 is an abundant number, since it is smaller than the sum of its proper divisors (907059096210).

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

645344356110 is a wasteful number, since it uses less digits than its factorization.

645344356110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49680532.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 645344356110 its reverse (11653443546), we get a palindrome (656997799656).

The spelling of 645344356110 in words is "six hundred forty-five billion, three hundred forty-four million, three hundred fifty-six thousand, one hundred ten".