645106224534 has 32 divisors (see below), whose sum is σ = 1389702526080. Its totient is φ = 198980131392.

The previous prime is 645106224527. The next prime is 645106224551. The reversal of 645106224534 is 435422601546.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65795407 + ... + 65805210.

It is an arithmetic number, because the mean of its divisors is an integer number (43428203940).

Almost surely, 2^645106224534 is an apocalyptic number.

645106224534 is an abundant number, since it is smaller than the sum of its proper divisors (744596301546).

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

645106224534 is a wasteful number, since it uses less digits than its factorization.

645106224534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131600684.

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

The spelling of 645106224534 in words is "six hundred forty-five billion, one hundred six million, two hundred twenty-four thousand, five hundred thirty-four".