12400406162491 has 2 divisors, whose sum is σ = 12400406162492. Its totient is φ = 12400406162490.

The previous prime is 12400406162467. The next prime is 12400406162567. The reversal of 12400406162491 is 19426160400421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12400406162491 - 2⁷ = 12400406162363 is a prime.

It is not a weakly prime, because it can be changed into another prime (12400406162411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200203081245 + 6200203081246.

It is an arithmetic number, because the mean of its divisors is an integer number (6200203081246).

Almost surely, 2^{12400406162491} is an apocalyptic number.

12400406162491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400406162491 is an equidigital number, since it uses as much as digits as its factorization.

12400406162491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 12400406162491 in words is "twelve trillion, four hundred billion, four hundred six million, one hundred sixty-two thousand, four hundred ninety-one".