12154556507 has 2 divisors, whose sum is σ = 12154556508. Its totient is φ = 12154556506.

The previous prime is 12154556501. The next prime is 12154556551. The reversal of 12154556507 is 70565545121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12154556507 - 2²⁶ = 12087447643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12154556501) 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 as a sum of consecutive naturals, namely, 6077278253 + 6077278254.

It is an arithmetic number, because the mean of its divisors is an integer number (6077278254).

Almost surely, 2^12154556507 is an apocalyptic number.

12154556507 is a deficient number, since it is larger than the sum of its proper divisors (1).

12154556507 is an equidigital number, since it uses as much as digits as its factorization.

12154556507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 12154556507 in words is "twelve billion, one hundred fifty-four million, five hundred fifty-six thousand, five hundred seven".