645053512443 has 16 divisors (see below), whose sum is σ = 889807710720. Its totient is φ = 415170118944.

The previous prime is 645053512429. The next prime is 645053512489. The reversal of 645053512443 is 344215350546.

It is not a de Polignac number, because 645053512443 - 2⁴ = 645053512427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645053512395 and 645053512404.

It is not an unprimeable number, because it can be changed into a prime (645053517443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678480 + ... + 1323042.

It is an arithmetic number, because the mean of its divisors is an integer number (55612981920).

Almost surely, 2^645053512443 is an apocalyptic number.

645053512443 is a deficient number, since it is larger than the sum of its proper divisors (244754198277).

645053512443 is a wasteful number, since it uses less digits than its factorization.

645053512443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656098.

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 645053512443 its reverse (344215350546), we get a palindrome (989268862989).

The spelling of 645053512443 in words is "six hundred forty-five billion, fifty-three million, five hundred twelve thousand, four hundred forty-three".