211401023655 has 64 divisors (see below), whose sum is σ = 345019917312. Its totient is φ = 110512174080.

The previous prime is 211401023591. The next prime is 211401023693. The reversal of 211401023655 is 556320104112.

211401023655 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 211401023655 - 2⁶ = 211401023591 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 160030395 + ... + 160031715.

It is an arithmetic number, because the mean of its divisors is an integer number (5390936208).

Almost surely, 2^211401023655 is an apocalyptic number.

211401023655 is a deficient number, since it is larger than the sum of its proper divisors (133618893657).

211401023655 is a wasteful number, since it uses less digits than its factorization.

211401023655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 211401023655 its reverse (556320104112), we get a palindrome (767721127767).

The spelling of 211401023655 in words is "two hundred eleven billion, four hundred one million, twenty-three thousand, six hundred fifty-five".