211616562641 has 4 divisors (see below), whose sum is σ = 230854431984. Its totient is φ = 192378693300.

The previous prime is 211616562631. The next prime is 211616562667. The reversal of 211616562641 is 146265616112.

211616562641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211616562641 - 2²² = 211612368337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211616562631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9618934655 + ... + 9618934676.

It is an arithmetic number, because the mean of its divisors is an integer number (57713607996).

Almost surely, 2^211616562641 is an apocalyptic number.

It is an amenable number.

211616562641 is a deficient number, since it is larger than the sum of its proper divisors (19237869343).

211616562641 is a wasteful number, since it uses less digits than its factorization.

211616562641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19237869342.

The product of its digits is 103680, while the sum is 41.

The spelling of 211616562641 in words is "two hundred eleven billion, six hundred sixteen million, five hundred sixty-two thousand, six hundred forty-one".