897768161785 has 12 divisors (see below), whose sum is σ = 1184163625764. Its totient is φ = 652922299040.

The previous prime is 897768161747. The next prime is 897768161887. The reversal of 897768161785 is 587161867798.

It can be written as a sum of positive squares in 2 ways, for example, as 434787259456 + 462980902329 = 659384^2 + 680427^2 .

It is not a de Polignac number, because 897768161785 - 2⁹ = 897768161273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741956554 + ... + 741957763.

It is an arithmetic number, because the mean of its divisors is an integer number (98680302147).

Almost surely, 2^897768161785 is an apocalyptic number.

It is an amenable number.

897768161785 is a deficient number, since it is larger than the sum of its proper divisors (286395463979).

897768161785 is a wasteful number, since it uses less digits than its factorization.

897768161785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483914344 (or 1483914333 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 73.

The spelling of 897768161785 in words is "eight hundred ninety-seven billion, seven hundred sixty-eight million, one hundred sixty-one thousand, seven hundred eighty-five".