645122323134 has 96 divisors (see below), whose sum is σ = 1473800500224. Its totient is φ = 203540990400.

The previous prime is 645122323123. The next prime is 645122323159. The reversal of 645122323134 is 431323221546.

645122323134 is a `hidden beast` number, since 6 + 4 + 512 + 2 + 3 + 2 + 3 + 134 = 666.

645122323134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645122323134² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106329969 + ... + 106336035.

It is an arithmetic number, because the mean of its divisors is an integer number (15352088544).

Almost surely, 2^645122323134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645122323134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736900250112).

645122323134 is an abundant number, since it is smaller than the sum of its proper divisors (828678177090).

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

645122323134 is a wasteful number, since it uses less digits than its factorization.

645122323134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742 (or 8739 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

It can be divided in two parts, 645122 and 323134, that added together give a square (968256 = 984²).

The spelling of 645122323134 in words is "six hundred forty-five billion, one hundred twenty-two million, three hundred twenty-three thousand, one hundred thirty-four".