12611894401 has 2 divisors, whose sum is σ = 12611894402. Its totient is φ = 12611894400.

The previous prime is 12611894389. The next prime is 12611894429. The reversal of 12611894401 is 10449811621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9450756225 + 3161138176 = 97215^2 + 56224^2 .

It is a cyclic number.

It is not a de Polignac number, because 12611894401 - 2²⁹ = 12075023489 is a prime.

It is not a weakly prime, because it can be changed into another prime (12611894501) 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, 6305947200 + 6305947201.

It is an arithmetic number, because the mean of its divisors is an integer number (6305947201).

Almost surely, 2^12611894401 is an apocalyptic number.

It is an amenable number.

12611894401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12611894401 is an equidigital number, since it uses as much as digits as its factorization.

12611894401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 12611894401 in words is "twelve billion, six hundred eleven million, eight hundred ninety-four thousand, four hundred one".