9897697683655 has 4 divisors (see below), whose sum is σ = 11877237220392. Its totient is φ = 7918158146920.

The previous prime is 9897697683619. The next prime is 9897697683661. The reversal of 9897697683655 is 5563867967989.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9897697683655 - 2⁷ = 9897697683527 is a prime.

It is a super-3 number, since 3×9897697683655³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989769768361 + ... + 989769768370.

It is an arithmetic number, because the mean of its divisors is an integer number (2969309305098).

Almost surely, 2^{9897697683655} is an apocalyptic number.

9897697683655 is a deficient number, since it is larger than the sum of its proper divisors (1979539536737).

9897697683655 is a wasteful number, since it uses less digits than its factorization.

9897697683655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979539536736.

The product of its digits is 37035532800, while the sum is 88.

The spelling of 9897697683655 in words is "nine trillion, eight hundred ninety-seven billion, six hundred ninety-seven million, six hundred eighty-three thousand, six hundred fifty-five".