645303236632 has 8 divisors (see below), whose sum is σ = 1209943568700. Its totient is φ = 322651618312.

The previous prime is 645303236621. The next prime is 645303236687. The reversal of 645303236632 is 236632303546.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40331452282 + ... + 40331452297.

Almost surely, 2^645303236632 is an apocalyptic number.

It is an amenable number.

645303236632 is a deficient number, since it is larger than the sum of its proper divisors (564640332068).

645303236632 is a wasteful number, since it uses less digits than its factorization.

645303236632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80662904585 (or 80662904581 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 43.

The spelling of 645303236632 in words is "six hundred forty-five billion, three hundred three million, two hundred thirty-six thousand, six hundred thirty-two".