12155566051 has 8 divisors (see below), whose sum is σ = 12219624000. Its totient is φ = 12091618560.

The previous prime is 12155566013. The next prime is 12155566091. The reversal of 12155566051 is 15066555121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12155566051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12155566051.

It is not an unprimeable number, because it can be changed into a prime (12155566001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197875 + ... + 251923.

It is an arithmetic number, because the mean of its divisors is an integer number (1527453000).

Almost surely, 2^12155566051 is an apocalyptic number.

12155566051 is a deficient number, since it is larger than the sum of its proper divisors (64057949).

12155566051 is an equidigital number, since it uses as much as digits as its factorization.

12155566051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55229.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 12155566051 in words is "twelve billion, one hundred fifty-five million, five hundred sixty-six thousand, fifty-one".