1984156453429 has 2 divisors, whose sum is σ = 1984156453430. Its totient is φ = 1984156453428.

The previous prime is 1984156453379. The next prime is 1984156453451. The reversal of 1984156453429 is 9243546514891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1911942252900 + 72214200529 = 1382730^2 + 268727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984156453429 - 2⁹ = 1984156452917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984156453469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992078226714 + 992078226715.

It is an arithmetic number, because the mean of its divisors is an integer number (992078226715).

Almost surely, 2^{1984156453429} is an apocalyptic number.

It is an amenable number.

1984156453429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984156453429 is an equidigital number, since it uses as much as digits as its factorization.

1984156453429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 61.

The spelling of 1984156453429 in words is "one trillion, nine hundred eighty-four billion, one hundred fifty-six million, four hundred fifty-three thousand, four hundred twenty-nine".