212826169809 has 24 divisors (see below), whose sum is σ = 335398089312. Its totient is φ = 128971849920.

The previous prime is 212826169807. The next prime is 212826169819. The reversal of 212826169809 is 908961628212.

It is a happy number.

212826169809 is a `hidden beast` number, since 2 + 12 + 8 + 2 + 616 + 9 + 8 + 0 + 9 = 666.

212826169809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212826169809 - 2¹ = 212826169807 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (212826169807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 864154 + ... + 1082780.

It is an arithmetic number, because the mean of its divisors is an integer number (13974920388).

Almost surely, 2^212826169809 is an apocalyptic number.

It is an amenable number.

212826169809 is a deficient number, since it is larger than the sum of its proper divisors (122571919503).

212826169809 is a wasteful number, since it uses less digits than its factorization.

212826169809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228477 (or 228474 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 212826169809 in words is "two hundred twelve billion, eight hundred twenty-six million, one hundred sixty-nine thousand, eight hundred nine".