12004166256405 has 32 divisors (see below), whose sum is σ = 19230432908544. Its totient is φ = 6394300770816.

The previous prime is 12004166256373. The next prime is 12004166256409. The reversal of 12004166256405 is 50465266140021.

It is not a de Polignac number, because 12004166256405 - 2⁵ = 12004166256373 is a prime.

It is a super-2 number, since 2×12004166256405² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004166256409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265985952 + ... + 266031078.

It is an arithmetic number, because the mean of its divisors is an integer number (600951028392).

Almost surely, 2^{12004166256405} is an apocalyptic number.

12004166256405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12004166256405 is a deficient number, since it is larger than the sum of its proper divisors (7226266652139).

12004166256405 is a wasteful number, since it uses less digits than its factorization.

12004166256405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66685.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 12004166256405 in words is "twelve trillion, four billion, one hundred sixty-six million, two hundred fifty-six thousand, four hundred five".