211187636768 has 36 divisors (see below), whose sum is σ = 417580667658. Its totient is φ = 105135575040.

The previous prime is 211187636767. The next prime is 211187636773. The reversal of 211187636768 is 867636781112.

It can be written as a sum of positive squares in 3 ways, for example, as 188887590544 + 22300046224 = 434612^2 + 149332^2 .

It is not an unprimeable number, because it can be changed into a prime (211187636761) 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, 40354280 + ... + 40359512.

Almost surely, 2^211187636768 is an apocalyptic number.

It is an amenable number.

211187636768 is a deficient number, since it is larger than the sum of its proper divisors (206393030890).

211187636768 is an frugal number, since it uses more digits than its factorization.

211187636768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10717 (or 5476 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The spelling of 211187636768 in words is "two hundred eleven billion, one hundred eighty-seven million, six hundred thirty-six thousand, seven hundred sixty-eight".