211740457655 has 16 divisors (see below), whose sum is σ = 255949155840. Its totient is φ = 168152273568.

The previous prime is 211740457597. The next prime is 211740457679. The reversal of 211740457655 is 556754047112.

It is a cyclic number.

It is not a de Polignac number, because 211740457655 - 2⁸ = 211740457399 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7563614 + ... + 7591556.

It is an arithmetic number, because the mean of its divisors is an integer number (15996822240).

Almost surely, 2^211740457655 is an apocalyptic number.

211740457655 is a deficient number, since it is larger than the sum of its proper divisors (44208698185).

211740457655 is a wasteful number, since it uses less digits than its factorization.

211740457655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38990.

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 211740457655 in words is "two hundred eleven billion, seven hundred forty million, four hundred fifty-seven thousand, six hundred fifty-five".