645060316244 has 6 divisors (see below), whose sum is σ = 1128855553434. Its totient is φ = 322530158120.

The previous prime is 645060316189. The next prime is 645060316291. The reversal of 645060316244 is 442613060546.

It can be written as a sum of positive squares in only one way, i.e., 634205176900 + 10855139344 = 796370^2 + 104188^2 .

It is a super-2 number, since 2×645060316244² (a number of 24 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 80632539527 + ... + 80632539534.

It is an arithmetic number, because the mean of its divisors is an integer number (188142592239).

Almost surely, 2^645060316244 is an apocalyptic number.

It is an amenable number.

645060316244 is a deficient number, since it is larger than the sum of its proper divisors (483795237190).

645060316244 is a wasteful number, since it uses less digits than its factorization.

645060316244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161265079065 (or 161265079063 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 645060316244 in words is "six hundred forty-five billion, sixty million, three hundred sixteen thousand, two hundred forty-four".