645143352 has 32 divisors (see below), whose sum is σ = 1843267200. Its totient is φ = 184326624.

The previous prime is 645143351. The next prime is 645143371. The reversal of 645143352 is 253341546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645143351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919902 + ... + 1920237.

It is an arithmetic number, because the mean of its divisors is an integer number (57602100).

Almost surely, 2^645143352 is an apocalyptic number.

It is an amenable number.

645143352 is an abundant number, since it is smaller than the sum of its proper divisors (1198123848).

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

645143352 is a wasteful number, since it uses less digits than its factorization.

645143352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840155 (or 3840151 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 645143352 is about 25399.6722813504. The cubic root of 645143352 is about 864.0762642728.

Adding to 645143352 its reverse (253341546), we get a palindrome (898484898).

The spelling of 645143352 in words is "six hundred forty-five million, one hundred forty-three thousand, three hundred fifty-two".