645058118124 has 192 divisors, whose sum is σ = 1936535193600. Its totient is φ = 181878276096.

The previous prime is 645058118087. The next prime is 645058118147. The reversal of 645058118124 is 421811850546.

645058118124 is a `hidden beast` number, since 6 + 4 + 50 + 581 + 1 + 8 + 12 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 645058118124.

It is an unprimeable number.

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 in 63 ways as a sum of consecutive naturals, for example, 25873737 + ... + 25898655.

It is an arithmetic number, because the mean of its divisors is an integer number (10086120800).

Almost surely, 2^645058118124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645058118124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968267596800).

645058118124 is an abundant number, since it is smaller than the sum of its proper divisors (1291477075476).

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

645058118124 is a wasteful number, since it uses less digits than its factorization.

645058118124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25389 (or 25381 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 645058118124 in words is "six hundred forty-five billion, fifty-eight million, one hundred eighteen thousand, one hundred twenty-four".