211686377328 has 60 divisors (see below), whose sum is σ = 618185589840. Its totient is φ = 67494206208.

The previous prime is 211686377261. The next prime is 211686377333. The reversal of 211686377328 is 823773686112.

It is a happy number.

It is a super-2 number, since 2×211686377328² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31954173 + ... + 31960796.

It is an arithmetic number, because the mean of its divisors is an integer number (10303093164).

Almost surely, 2^211686377328 is an apocalyptic number.

It is an amenable number.

211686377328 is an abundant number, since it is smaller than the sum of its proper divisors (406499212512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211686377328 is a wasteful number, since it uses less digits than its factorization.

211686377328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63915006 (or 63914997 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 211686377328 in words is "two hundred eleven billion, six hundred eighty-six million, three hundred seventy-seven thousand, three hundred twenty-eight".