645474360 has 128 divisors (see below), whose sum is σ = 2058073920. Its totient is φ = 161390592.

The previous prime is 645474311. The next prime is 645474383. The reversal of 645474360 is 63474546.

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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 809482 + ... + 810278.

Almost surely, 2^645474360 is an apocalyptic number.

645474360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645474360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029036960).

645474360 is an abundant number, since it is smaller than the sum of its proper divisors (1412599560).

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

645474360 is a wasteful number, since it uses less digits than its factorization.

645474360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 645474360 is about 25406.1874353473. The cubic root of 645474360 is about 864.2240181289.

The spelling of 645474360 in words is "six hundred forty-five million, four hundred seventy-four thousand, three hundred sixty".