645321102 has 8 divisors (see below), whose sum is σ = 1290642216. Its totient is φ = 215107032.

The previous prime is 645321077. The next prime is 645321113. The reversal of 645321102 is 201123546.

It is a sphenic number, since it is the product of 3 distinct primes.

645321102 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53776753 + ... + 53776764.

It is an arithmetic number, because the mean of its divisors is an integer number (161330277).

Almost surely, 2^645321102 is an apocalyptic number.

645321102 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.

645321102 is a wasteful number, since it uses less digits than its factorization.

645321102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107553522.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 645321102 is about 25403.1711012621. The cubic root of 645321102 is about 864.1556137962.

Adding to 645321102 its reverse (201123546), we get a palindrome (846444648).

The spelling of 645321102 in words is "six hundred forty-five million, three hundred twenty-one thousand, one hundred two".