211661741079 has 6 divisors (see below), whose sum is σ = 305733626016. Its totient is φ = 141107827380.

The previous prime is 211661741077. The next prime is 211661741143. The reversal of 211661741079 is 970147166112.

211661741079 is a `hidden beast` number, since 2 + 1 + 16 + 617 + 4 + 10 + 7 + 9 = 666.

It is not a de Polignac number, because 211661741079 - 2¹ = 211661741077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211661741077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11758985607 + ... + 11758985624.

It is an arithmetic number, because the mean of its divisors is an integer number (50955604336).

Almost surely, 2^211661741079 is an apocalyptic number.

211661741079 is a deficient number, since it is larger than the sum of its proper divisors (94071884937).

211661741079 is a wasteful number, since it uses less digits than its factorization.

211661741079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23517971237 (or 23517971234 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 211661741079 in words is "two hundred eleven billion, six hundred sixty-one million, seven hundred forty-one thousand, seventy-nine".