212765171808 has 96 divisors (see below), whose sum is σ = 638372157696. Its totient is φ = 60782750208.

The previous prime is 212765171791. The next prime is 212765171863. The reversal of 212765171808 is 808171567212.

212765171808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8268210 + ... + 8293902.

It is an arithmetic number, because the mean of its divisors is an integer number (6649709976).

Almost surely, 2^212765171808 is an apocalyptic number.

212765171808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212765171808 is an abundant number, since it is smaller than the sum of its proper divisors (425606985888).

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

212765171808 is a wasteful number, since it uses less digits than its factorization.

212765171808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38036 (or 38028 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 212765171808 in words is "two hundred twelve billion, seven hundred sixty-five million, one hundred seventy-one thousand, eight hundred eight".