645305349480 has 128 divisors (see below), whose sum is σ = 2112102967680. Its totient is φ = 156423249920.

The previous prime is 645305349431. The next prime is 645305349503. The reversal of 645305349480 is 84943503546.

645305349480 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 803309²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24085852 + ... + 24112628.

It is an arithmetic number, because the mean of its divisors is an integer number (16500804435).

Almost surely, 2^645305349480 is an apocalyptic number.

645305349480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645305349480 is an abundant number, since it is smaller than the sum of its proper divisors (1466797618200).

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

645305349480 is a wasteful number, since it uses less digits than its factorization.

645305349480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45059 (or 45055 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 645305349480 in words is "six hundred forty-five billion, three hundred five million, three hundred forty-nine thousand, four hundred eighty".