12126154566 has 16 divisors (see below), whose sum is σ = 24286914288. Its totient is φ = 4036284000.

The previous prime is 12126154543. The next prime is 12126154613. The reversal of 12126154566 is 66545162121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437325 + ... + 1445736.

It is an arithmetic number, because the mean of its divisors is an integer number (1517932143).

Almost surely, 2^12126154566 is an apocalyptic number.

12126154566 is an abundant number, since it is smaller than the sum of its proper divisors (12160759722).

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

12126154566 is a wasteful number, since it uses less digits than its factorization.

12126154566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883767.

The product of its digits is 86400, while the sum is 39.

The spelling of 12126154566 in words is "twelve billion, one hundred twenty-six million, one hundred fifty-four thousand, five hundred sixty-six".