897768161786 has 8 divisors (see below), whose sum is σ = 1359006850740. Its totient is φ = 444765878208.

The previous prime is 897768161747. The next prime is 897768161887. The reversal of 897768161786 is 687161867798.

It can be written as a sum of positive squares in 2 ways, for example, as 870927565225 + 26840596561 = 933235^2 + 163831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×897768161786² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059101071 + ... + 2059101506.

Almost surely, 2^897768161786 is an apocalyptic number.

897768161786 is a deficient number, since it is larger than the sum of its proper divisors (461238688954).

897768161786 is a wasteful number, since it uses less digits than its factorization.

897768161786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118202688.

The product of its digits is 341397504, while the sum is 74.

The spelling of 897768161786 in words is "eight hundred ninety-seven billion, seven hundred sixty-eight million, one hundred sixty-one thousand, seven hundred eighty-six".