645111150 has 48 divisors (see below), whose sum is σ = 1608782448. Its totient is φ = 171072000.

The previous prime is 645111127. The next prime is 645111151. The reversal of 645111150 is 51111546.

It is a self number, because there is not a number n which added to its sum of digits gives 645111150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645111151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15270 + ... + 39030.

It is an arithmetic number, because the mean of its divisors is an integer number (33516301).

Almost surely, 2^645111150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645111150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804391224).

645111150 is an abundant number, since it is smaller than the sum of its proper divisors (963671298).

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

645111150 is a wasteful number, since it uses less digits than its factorization.

645111150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23957 (or 23952 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 645111150 is about 25399.0383676233. The cubic root of 645111150 is about 864.0618873922.

Adding to 645111150 its reverse (51111546), we get a palindrome (696222696).

The spelling of 645111150 in words is "six hundred forty-five million, one hundred eleven thousand, one hundred fifty".