645028650356 has 12 divisors (see below), whose sum is σ = 1129817999940. Its totient is φ = 322223507520.

The previous prime is 645028650349. The next prime is 645028650359. The reversal of 645028650356 is 653056820546.

645028650356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 297424073956 + 347604576400 = 545366^2 + 589580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645028650359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72699425 + ... + 72708296.

It is an arithmetic number, because the mean of its divisors is an integer number (94151499995).

Almost surely, 2^645028650356 is an apocalyptic number.

It is an amenable number.

645028650356 is a deficient number, since it is larger than the sum of its proper divisors (484789349584).

645028650356 is a wasteful number, since it uses less digits than its factorization.

645028650356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145408834 (or 145408832 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 645028650356 in words is "six hundred forty-five billion, twenty-eight million, six hundred fifty thousand, three hundred fifty-six".