12155253566 has 16 divisors (see below), whose sum is σ = 18381834240. Its totient is φ = 6028003800.

The previous prime is 12155253527. The next prime is 12155253619. The reversal of 12155253566 is 66535255121.

12155253566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482065 + ... + 1490243.

It is an arithmetic number, because the mean of its divisors is an integer number (1148864640).

Almost surely, 2^12155253566 is an apocalyptic number.

12155253566 is a deficient number, since it is larger than the sum of its proper divisors (6226580674).

12155253566 is a wasteful number, since it uses less digits than its factorization.

12155253566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14159.

The product of its digits is 270000, while the sum is 41.

The spelling of 12155253566 in words is "twelve billion, one hundred fifty-five million, two hundred fifty-three thousand, five hundred sixty-six".