645295552 has 28 divisors (see below), whose sum is σ = 1396919736. Its totient is φ = 293315840.

The previous prime is 645295549. The next prime is 645295561. The reversal of 645295552 is 255592546.

645295552 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 = 645295499 and 645295508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457603 + ... + 459010.

Almost surely, 2^645295552 is an apocalyptic number.

It is an amenable number.

645295552 is an abundant number, since it is smaller than the sum of its proper divisors (751624184).

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

645295552 is a wasteful number, since it uses less digits than its factorization.

645295552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916636 (or 916626 counting only the distinct ones).

The product of its digits is 540000, while the sum is 43.

The square root of 645295552 is about 25402.6682063125. The cubic root of 645295552 is about 864.1442088965.

The spelling of 645295552 in words is "six hundred forty-five million, two hundred ninety-five thousand, five hundred fifty-two".