645634345126 has 8 divisors (see below), whose sum is σ = 968470875504. Its totient is φ = 322810719960.

The previous prime is 645634345121. The next prime is 645634345199. The reversal of 645634345126 is 621543436546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 645634345126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645634345121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3100245 + ... + 3301936.

It is an arithmetic number, because the mean of its divisors is an integer number (121058859438).

Almost surely, 2^645634345126 is an apocalyptic number.

645634345126 is a deficient number, since it is larger than the sum of its proper divisors (322836530378).

645634345126 is a wasteful number, since it uses less digits than its factorization.

645634345126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452606.

The product of its digits is 6220800, while the sum is 49.

The spelling of 645634345126 in words is "six hundred forty-five billion, six hundred thirty-four million, three hundred forty-five thousand, one hundred twenty-six".