12655420127 has 4 divisors (see below), whose sum is σ = 14463337296. Its totient is φ = 10847502960.

The previous prime is 12655420123. The next prime is 12655420147. The reversal of 12655420127 is 72102455621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12655420127 - 2² = 12655420123 is a prime.

It is a super-2 number, since 2×12655420127² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655420121) 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 3 ways as a sum of consecutive naturals, for example, 903958574 + ... + 903958587.

It is an arithmetic number, because the mean of its divisors is an integer number (3615834324).

Almost surely, 2^12655420127 is an apocalyptic number.

12655420127 is a deficient number, since it is larger than the sum of its proper divisors (1807917169).

12655420127 is an equidigital number, since it uses as much as digits as its factorization.

12655420127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807917168.

The product of its (nonzero) digits is 33600, while the sum is 35.

Adding to 12655420127 its reverse (72102455621), we get a palindrome (84757875748).

The spelling of 12655420127 in words is "twelve billion, six hundred fifty-five million, four hundred twenty thousand, one hundred twenty-seven".