645456060 has 96 divisors (see below), whose sum is σ = 2012371200. Its totient is φ = 171754560.

The previous prime is 645456059. The next prime is 645456073. The reversal of 645456060 is 60654546.

It is a happy number.

645456060 is a `hidden beast` number, since 6 + 4 + 5 + 45 + 606 + 0 = 666.

645456060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645456060² = 833227050781447200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 333295 + ... + 335225.

It is an arithmetic number, because the mean of its divisors is an integer number (20962200).

Almost surely, 2^645456060 is an apocalyptic number.

645456060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645456060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006185600).

645456060 is an abundant number, since it is smaller than the sum of its proper divisors (1366915140).

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

645456060 is a wasteful number, since it uses less digits than its factorization.

645456060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 645456060 is about 25405.8272843063. The cubic root of 645456060 is about 864.2158507769.

The spelling of 645456060 in words is "six hundred forty-five million, four hundred fifty-six thousand, sixty".