645633045048 has 64 divisors (see below), whose sum is σ = 1615785292800. Its totient is φ = 214984143360.

The previous prime is 645633045017. The next prime is 645633045143. The reversal of 645633045048 is 840540336546.

It is a junction number, because it is equal to n+sod(n) for n = 645633044988 and 645633045006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136755328 + ... + 136760048.

It is an arithmetic number, because the mean of its divisors is an integer number (25246645200).

Almost surely, 2^645633045048 is an apocalyptic number.

It is an amenable number.

645633045048 is an abundant number, since it is smaller than the sum of its proper divisors (970152247752).

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

645633045048 is a wasteful number, since it uses less digits than its factorization.

645633045048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9532 (or 9528 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 645633045048 in words is "six hundred forty-five billion, six hundred thirty-three million, forty-five thousand, forty-eight".