211548986864 has 20 divisors (see below), whose sum is σ = 413503388256. Its totient is φ = 104838435072.

The previous prime is 211548986863. The next prime is 211548986881. The reversal of 211548986864 is 468689845112.

It is a junction number, because it is equal to n+sod(n) for n = 211548986797 and 211548986806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211548986863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58501784 + ... + 58505399.

Almost surely, 2^211548986864 is an apocalyptic number.

It is an amenable number.

211548986864 is a deficient number, since it is larger than the sum of its proper divisors (201954401392).

211548986864 is a wasteful number, since it uses less digits than its factorization.

211548986864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117007304 (or 117007298 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The spelling of 211548986864 in words is "two hundred eleven billion, five hundred forty-eight million, nine hundred eighty-six thousand, eight hundred sixty-four".