645141451 has 2 divisors, whose sum is σ = 645141452. Its totient is φ = 645141450.

The previous prime is 645141407. The next prime is 645141463. The reversal of 645141451 is 154141546.

645141451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645141451 - 2¹¹ = 645139403 is a prime.

It is not a weakly prime, because it can be changed into another prime (645141401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322570725 + 322570726.

It is an arithmetic number, because the mean of its divisors is an integer number (322570726).

Almost surely, 2^645141451 is an apocalyptic number.

645141451 is a deficient number, since it is larger than the sum of its proper divisors (1).

645141451 is an equidigital number, since it uses as much as digits as its factorization.

645141451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

The square root of 645141451 is about 25399.6348595802. The cubic root of 645141451 is about 864.0754155671.

Adding to 645141451 its reverse (154141546), we get a palindrome (799282997).

The spelling of 645141451 in words is "six hundred forty-five million, one hundred forty-one thousand, four hundred fifty-one".