645245563142 has 16 divisors (see below), whose sum is σ = 991541207664. Its totient is φ = 314732880000.

The previous prime is 645245563099. The next prime is 645245563163. The reversal of 645245563142 is 241365542546.

It is a congruent number.

It is an unprimeable number.

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, 1007417 + ... + 1518347.

It is an arithmetic number, because the mean of its divisors is an integer number (61971325479).

Almost surely, 2^645245563142 is an apocalyptic number.

645245563142 is a deficient number, since it is larger than the sum of its proper divisors (346295644522).

645245563142 is a wasteful number, since it uses less digits than its factorization.

645245563142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526375.

The product of its digits is 3456000, while the sum is 47.

The spelling of 645245563142 in words is "six hundred forty-five billion, two hundred forty-five million, five hundred sixty-three thousand, one hundred forty-two".