645143750000 has 180 divisors, whose sum is σ = 1578456223080. Its totient is φ = 255420000000.

The previous prime is 645143749997. The next prime is 645143750039. The reversal of 645143750000 is 57341546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 681249527 + ... + 681250473.

Almost surely, 2^645143750000 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 645143750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789228111540).

645143750000 is an abundant number, since it is smaller than the sum of its proper divisors (933312473080).

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

645143750000 is an frugal number, since it uses more digits than its factorization.

645143750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 645143750000 in words is "six hundred forty-five billion, one hundred forty-three million, seven hundred fifty thousand".