645633045052 has 6 divisors (see below), whose sum is σ = 1129857828848. Its totient is φ = 322816522524.

The previous prime is 645633045017. The next prime is 645633045143. The reversal of 645633045052 is 250540336546.

645633045052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80704130628 + ... + 80704130635.

Almost surely, 2^645633045052 is an apocalyptic number.

It is an amenable number.

645633045052 is a deficient number, since it is larger than the sum of its proper divisors (484224783796).

645633045052 is a wasteful number, since it uses less digits than its factorization.

645633045052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161408261267 (or 161408261265 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 43.

The spelling of 645633045052 in words is "six hundred forty-five billion, six hundred thirty-three million, forty-five thousand, fifty-two".