645301267450 has 48 divisors (see below), whose sum is σ = 1374851111040. Its totient is φ = 220742118720.

The previous prime is 645301267439. The next prime is 645301267453. The reversal of 645301267450 is 54762103546.

It is a junction number, because it is equal to n+sod(n) for n = 645301267397 and 645301267406.

It is not an unprimeable number, because it can be changed into a prime (645301267453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1946257 + ... + 2253556.

It is an arithmetic number, because the mean of its divisors is an integer number (28642731480).

Almost surely, 2^645301267450 is an apocalyptic number.

645301267450 is an abundant number, since it is smaller than the sum of its proper divisors (729549843590).

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

645301267450 is a wasteful number, since it uses less digits than its factorization.

645301267450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200271 (or 4200266 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 645301267450 in words is "six hundred forty-five billion, three hundred one million, two hundred sixty-seven thousand, four hundred fifty".