211706672075 has 18 divisors (see below), whose sum is σ = 277060123044. Its totient is φ = 160451365680.

The previous prime is 211706672071. The next prime is 211706672131. The reversal of 211706672075 is 570276607112.

It is not a de Polignac number, because 211706672075 - 2² = 211706672071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211706672071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11719877 + ... + 11737926.

It is an arithmetic number, because the mean of its divisors is an integer number (15392229058).

Almost surely, 2^211706672075 is an apocalyptic number.

211706672075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

211706672075 is a deficient number, since it is larger than the sum of its proper divisors (65353450969).

211706672075 is a wasteful number, since it uses less digits than its factorization.

211706672075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23457851 (or 23457827 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 211706672075 in words is "two hundred eleven billion, seven hundred six million, six hundred seventy-two thousand, seventy-five".