645287189296 has 40 divisors (see below), whose sum is σ = 1309800167424. Its totient is φ = 307386024000.

The previous prime is 645287189279. The next prime is 645287189297. The reversal of 645287189296 is 692981782546.

It is not an unprimeable number, because it can be changed into a prime (645287189297) 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 7 ways as a sum of consecutive naturals, for example, 3400656 + ... + 3585391.

Almost surely, 2^645287189296 is an apocalyptic number.

It is an amenable number.

645287189296 is an abundant number, since it is smaller than the sum of its proper divisors (664512978128).

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

645287189296 is a wasteful number, since it uses less digits than its factorization.

645287189296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986329 (or 6986323 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 67.

The spelling of 645287189296 in words is "six hundred forty-five billion, two hundred eighty-seven million, one hundred eighty-nine thousand, two hundred ninety-six".