211504044545 has 24 divisors (see below), whose sum is σ = 270565986624. Its totient is φ = 158687076096.

The previous prime is 211504044527. The next prime is 211504044623. The reversal of 211504044545 is 545440405112.

211504044545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211504044545 - 2⁸ = 211504044289 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150332 + ... + 667538.

It is an arithmetic number, because the mean of its divisors is an integer number (11273582776).

Almost surely, 2^211504044545 is an apocalyptic number.

It is an amenable number.

211504044545 is a deficient number, since it is larger than the sum of its proper divisors (59061942079).

211504044545 is a wasteful number, since it uses less digits than its factorization.

211504044545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517529 (or 517512 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 211504044545 its reverse (545440405112), we get a palindrome (756944449657).

The spelling of 211504044545 in words is "two hundred eleven billion, five hundred four million, forty-four thousand, five hundred forty-five".