645302416254 has 32 divisors (see below), whose sum is σ = 1438445018880. Its totient is φ = 191792668032.

The previous prime is 645302416219. The next prime is 645302416277. The reversal of 645302416254 is 452614203546.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166484754 + ... + 166488629.

It is an arithmetic number, because the mean of its divisors is an integer number (44951406840).

Almost surely, 2^645302416254 is an apocalyptic number.

645302416254 is an abundant number, since it is smaller than the sum of its proper divisors (793142602626).

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

645302416254 is a wasteful number, since it uses less digits than its factorization.

645302416254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332973424.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 645302416254 in words is "six hundred forty-five billion, three hundred two million, four hundred sixteen thousand, two hundred fifty-four".