12654617191 has 2 divisors, whose sum is σ = 12654617192. Its totient is φ = 12654617190.

The previous prime is 12654617147. The next prime is 12654617221. The reversal of 12654617191 is 19171645621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12654617191 - 2¹³ = 12654608999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12654617111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327308595 + 6327308596.

It is an arithmetic number, because the mean of its divisors is an integer number (6327308596).

Almost surely, 2^12654617191 is an apocalyptic number.

12654617191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12654617191 is an equidigital number, since it uses as much as digits as its factorization.

12654617191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The spelling of 12654617191 in words is "twelve billion, six hundred fifty-four million, six hundred seventeen thousand, one hundred ninety-one".