857603099489 has 2 divisors, whose sum is σ = 857603099490. Its totient is φ = 857603099488.

The previous prime is 857603099473. The next prime is 857603099539. The reversal of 857603099489 is 984990306758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505936309264 + 351666790225 = 711292^2 + 593015^2 .

It is a cyclic number.

It is not a de Polignac number, because 857603099489 - 2⁴ = 857603099473 is a prime.

It is a super-2 number, since 2×857603099489² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (857603099449) 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, 428801549744 + 428801549745.

It is an arithmetic number, because the mean of its divisors is an integer number (428801549745).

Almost surely, 2^857603099489 is an apocalyptic number.

It is an amenable number.

857603099489 is a deficient number, since it is larger than the sum of its proper divisors (1).

857603099489 is an equidigital number, since it uses as much as digits as its factorization.

857603099489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 68.

The spelling of 857603099489 in words is "eight hundred fifty-seven billion, six hundred three million, ninety-nine thousand, four hundred eighty-nine".