212177956884 has 12 divisors (see below), whose sum is σ = 495081899424. Its totient is φ = 70725985624.

The previous prime is 212177956883. The next prime is 212177956889. The reversal of 212177956884 is 488659771212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212177956883) 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, 8840748192 + ... + 8840748215.

It is an arithmetic number, because the mean of its divisors is an integer number (41256824952).

Almost surely, 2^212177956884 is an apocalyptic number.

It is an amenable number.

212177956884 is an abundant number, since it is smaller than the sum of its proper divisors (282903942540).

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

212177956884 is a wasteful number, since it uses less digits than its factorization.

212177956884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17681496414 (or 17681496412 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 60.

The spelling of 212177956884 in words is "two hundred twelve billion, one hundred seventy-seven million, nine hundred fifty-six thousand, eight hundred eighty-four".