645930785088 has 168 divisors, whose sum is σ = 1865035111680. Its totient is φ = 213733969920.

The previous prime is 645930785069. The next prime is 645930785161. The reversal of 645930785088 is 880587039546.

645930785088 is a `hidden beast` number, since 6 + 4 + 59 + 3 + 0 + 78 + 508 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62578968 + ... + 62589288.

Almost surely, 2^645930785088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645930785088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932517555840).

645930785088 is an abundant number, since it is smaller than the sum of its proper divisors (1219104326592).

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

645930785088 is a wasteful number, since it uses less digits than its factorization.

645930785088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125 (or 11112 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 645930785088 in words is "six hundred forty-five billion, nine hundred thirty million, seven hundred eighty-five thousand, eighty-eight".