645716127552 has 56 divisors (see below), whose sum is σ = 1708605168000. Its totient is φ = 215220074496.

The previous prime is 645716127541. The next prime is 645716127571. The reversal of 645716127552 is 255721617546.

645716127552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645716127495 and 645716127504.

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, 2173849 + ... + 2452967.

Almost surely, 2^645716127552 is an apocalyptic number.

It is an amenable number.

645716127552 is an abundant number, since it is smaller than the sum of its proper divisors (1062889040448).

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

645716127552 is a wasteful number, since it uses less digits than its factorization.

645716127552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291183 (or 291173 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 51.

The spelling of 645716127552 in words is "six hundred forty-five billion, seven hundred sixteen million, one hundred twenty-seven thousand, five hundred fifty-two".