645730734367200 has 144 divisors (see below), whose sum is σ = 2102010371225856. Its totient is φ = 172182014092800.

The previous prime is 645730734367189. The next prime is 645730734367307. The reversal of 645730734367200 is 2763437037546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22155289 + ... + 42217511.

It is an arithmetic number, because the mean of its divisors is an integer number (14597294244624).

Almost surely, 2^{645730734367200} is an apocalyptic number.

645730734367200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645730734367200 is an abundant number, since it is smaller than the sum of its proper divisors (1456279636858656).

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

645730734367200 is a wasteful number, since it uses less digits than its factorization.

645730734367200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20075657 (or 20075644 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 57.

The spelling of 645730734367200 in words is "six hundred forty-five trillion, seven hundred thirty billion, seven hundred thirty-four million, three hundred sixty-seven thousand, two hundred".