645415010650 has 12 divisors (see below), whose sum is σ = 1200471919902. Its totient is φ = 258166004240.

The previous prime is 645415010633. The next prime is 645415010651. The reversal of 645415010650 is 56010514546.

It can be written as a sum of positive squares in 3 ways, for example, as 600747456241 + 44667554409 = 775079^2 + 211347^2 .

It is a super-2 number, since 2×645415010650² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645415010651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6454150057 + ... + 6454150156.

Almost surely, 2^645415010650 is an apocalyptic number.

645415010650 is a deficient number, since it is larger than the sum of its proper divisors (555056909252).

645415010650 is a wasteful number, since it uses less digits than its factorization.

645415010650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908300225 (or 12908300220 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 645415010650 in words is "six hundred forty-five billion, four hundred fifteen million, ten thousand, six hundred fifty".