1985677133249 has 2 divisors, whose sum is σ = 1985677133250. Its totient is φ = 1985677133248.

The previous prime is 1985677133227. The next prime is 1985677133273. The reversal of 1985677133249 is 9423317765891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1985548719025 + 128414224 = 1409095^2 + 11332^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985677133249 - 2³² = 1981382165953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1985677133299) 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, 992838566624 + 992838566625.

It is an arithmetic number, because the mean of its divisors is an integer number (992838566625).

Almost surely, 2^{1985677133249} is an apocalyptic number.

It is an amenable number.

1985677133249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985677133249 is an equidigital number, since it uses as much as digits as its factorization.

1985677133249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 65.

The spelling of 1985677133249 in words is "one trillion, nine hundred eighty-five billion, six hundred seventy-seven million, one hundred thirty-three thousand, two hundred forty-nine".