645708551104 has 14 divisors (see below), whose sum is σ = 1281327906224. Its totient is φ = 322854275520.

The previous prime is 645708551101. The next prime is 645708551149. The reversal of 645708551104 is 401155807546.

It is a super-4 number, since 4×645708551104⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645708551101) 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 as a sum of consecutive naturals, namely, 5044597992 + ... + 5044598119.

Almost surely, 2^645708551104 is an apocalyptic number.

645708551104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645708551104 is a deficient number, since it is larger than the sum of its proper divisors (635619355120).

645708551104 is a wasteful number, since it uses less digits than its factorization.

645708551104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10089196123 (or 10089196113 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The spelling of 645708551104 in words is "six hundred forty-five billion, seven hundred eight million, five hundred fifty-one thousand, one hundred four".