645606348 has 36 divisors (see below), whose sum is σ = 1600248552. Its totient is φ = 202542080.

The previous prime is 645606319. The next prime is 645606349. The reversal of 645606348 is 843606546.

It is not an unprimeable number, because it can be changed into a prime (645606349) 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 11 ways as a sum of consecutive naturals, for example, 89613 + ... + 96548.

Almost surely, 2^645606348 is an apocalyptic number.

645606348 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

645606348 is an abundant number, since it is smaller than the sum of its proper divisors (954642204).

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

645606348 is a wasteful number, since it uses less digits than its factorization.

645606348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186202 (or 186183 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 645606348 is about 25408.7848587846. The cubic root of 645606348 is about 864.2829202495.

The spelling of 645606348 in words is "six hundred forty-five million, six hundred six thousand, three hundred forty-eight".