1235853720889 has 2 divisors, whose sum is σ = 1235853720890. Its totient is φ = 1235853720888.

The previous prime is 1235853720887. The next prime is 1235853720923. The reversal of 1235853720889 is 9880273585321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640973169664 + 594880551225 = 800608^2 + 771285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235853720889 - 2¹ = 1235853720887 is a prime.

Together with 1235853720887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1235853720887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617926860444 + 617926860445.

It is an arithmetic number, because the mean of its divisors is an integer number (617926860445).

Almost surely, 2^{1235853720889} is an apocalyptic number.

It is an amenable number.

1235853720889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235853720889 is an equidigital number, since it uses as much as digits as its factorization.

1235853720889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 1235853720889 in words is "one trillion, two hundred thirty-five billion, eight hundred fifty-three million, seven hundred twenty thousand, eight hundred eighty-nine".