211768086387 has 32 divisors (see below), whose sum is σ = 331861098240. Its totient is φ = 118421493120.

The previous prime is 211768086373. The next prime is 211768086419. The reversal of 211768086387 is 783680867112.

It is a de Polignac number, because none of the positive numbers 2^k-211768086387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211768086317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 921568 + ... + 1128194.

It is an arithmetic number, because the mean of its divisors is an integer number (10370659320).

Almost surely, 2^211768086387 is an apocalyptic number.

211768086387 is a deficient number, since it is larger than the sum of its proper divisors (120093011853).

211768086387 is a wasteful number, since it uses less digits than its factorization.

211768086387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209043.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 211768086387 in words is "two hundred eleven billion, seven hundred sixty-eight million, eighty-six thousand, three hundred eighty-seven".