126512145555 has 64 divisors (see below), whose sum is σ = 217513755648. Its totient is φ = 62561157120.

The previous prime is 126512145553. The next prime is 126512145581. The reversal of 126512145555 is 555541215621.

It is a happy number.

It is not a de Polignac number, because 126512145555 - 2¹ = 126512145553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126512145553) 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 63 ways as a sum of consecutive naturals, for example, 38254212 + ... + 38257518.

It is an arithmetic number, because the mean of its divisors is an integer number (3398652432).

Almost surely, 2^126512145555 is an apocalyptic number.

126512145555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126512145555 is a deficient number, since it is larger than the sum of its proper divisors (91001610093).

126512145555 is a wasteful number, since it uses less digits than its factorization.

126512145555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516.

The product of its digits is 300000, while the sum is 42.

The spelling of 126512145555 in words is "one hundred twenty-six billion, five hundred twelve million, one hundred forty-five thousand, five hundred fifty-five".