12154504517 has 2 divisors, whose sum is σ = 12154504518. Its totient is φ = 12154504516.

The previous prime is 12154504499. The next prime is 12154504543. The reversal of 12154504517 is 71540545121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10394618116 + 1759886401 = 101954^2 + 41951^2 .

It is a cyclic number.

It is not a de Polignac number, because 12154504517 - 2¹⁴ = 12154488133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12154504577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077252258 + 6077252259.

It is an arithmetic number, because the mean of its divisors is an integer number (6077252259).

Almost surely, 2^12154504517 is an apocalyptic number.

It is an amenable number.

12154504517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12154504517 is an equidigital number, since it uses as much as digits as its factorization.

12154504517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28000, while the sum is 35.

The spelling of 12154504517 in words is "twelve billion, one hundred fifty-four million, five hundred four thousand, five hundred seventeen".