12155025405 has 8 divisors (see below), whose sum is σ = 19448040672. Its totient is φ = 6482680208.

The previous prime is 12155025331. The next prime is 12155025409. The reversal of 12155025405 is 50452055121.

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

It is a cyclic number.

It is not a de Polignac number, because 12155025405 - 2¹⁰ = 12155024381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155025409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405167499 + ... + 405167528.

It is an arithmetic number, because the mean of its divisors is an integer number (2431005084).

Almost surely, 2^12155025405 is an apocalyptic number.

12155025405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12155025405 is a deficient number, since it is larger than the sum of its proper divisors (7293015267).

12155025405 is an equidigital number, since it uses as much as digits as its factorization.

12155025405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810335035.

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 12155025405 in words is "twelve billion, one hundred fifty-five million, twenty-five thousand, four hundred five".