12155531894 has 16 divisors (see below), whose sum is σ = 19895576400. Its totient is φ = 5523934560.

The previous prime is 12155531891. The next prime is 12155531897. The reversal of 12155531894 is 49813555121.

12155531894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12155531891) and next prime (12155531897).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155531891) by changing a digit.

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, 33032 + ... + 159380.

It is an arithmetic number, because the mean of its divisors is an integer number (1243473525).

Almost surely, 2^12155531894 is an apocalyptic number.

12155531894 is a deficient number, since it is larger than the sum of its proper divisors (7740044506).

12155531894 is a wasteful number, since it uses less digits than its factorization.

12155531894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130735.

The product of its digits is 216000, while the sum is 44.

The spelling of 12155531894 in words is "twelve billion, one hundred fifty-five million, five hundred thirty-one thousand, eight hundred ninety-four".