2138558017212 has 36 divisors (see below), whose sum is σ = 5408412380280. Its totient is φ = 712508107872.

The previous prime is 2138558017201. The next prime is 2138558017231. The reversal of 2138558017212 is 2127108558312.

2138558017212 is a `hidden beast` number, since 2 + 1 + 38 + 5 + 580 + 17 + 21 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14281338 + ... + 14430305.

It is an arithmetic number, because the mean of its divisors is an integer number (150233677230).

Almost surely, 2^{2138558017212} is an apocalyptic number.

It is an amenable number.

2138558017212 is an abundant number, since it is smaller than the sum of its proper divisors (3269854363068).

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

2138558017212 is a wasteful number, since it uses less digits than its factorization.

2138558017212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28713722 (or 28713717 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 2138558017212 in words is "two trillion, one hundred thirty-eight billion, five hundred fifty-eight million, seventeen thousand, two hundred twelve".