645542526032832 has 56 divisors (see below), whose sum is σ = 1763094641009152. Its totient is φ = 208239524524800.

The previous prime is 645542526032779. The next prime is 645542526032857. The reversal of 645542526032832 is 238230625245546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54229036894 + ... + 54229048797.

Almost surely, 2^{645542526032832} is an apocalyptic number.

645542526032832 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

645542526032832 is an abundant number, since it is smaller than the sum of its proper divisors (1117552114976320).

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

645542526032832 is a wasteful number, since it uses less digits than its factorization.

645542526032832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108458085737 (or 108458085727 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 57.

The spelling of 645542526032832 in words is "six hundred forty-five trillion, five hundred forty-two billion, five hundred twenty-six million, thirty-two thousand, eight hundred thirty-two".