9897697683656 has 16 divisors (see below), whose sum is σ = 18558283772940. Its totient is φ = 4948822010880.

The previous prime is 9897697683619. The next prime is 9897697683661. The reversal of 9897697683656 is 6563867967989.

It can be written as a sum of positive squares in 2 ways, for example, as 9875092561156 + 22605122500 = 3142466^2 + 150350^2 .

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, 1740425 + ... + 4777496.

Almost surely, 2^{9897697683656} is an apocalyptic number.

It is an amenable number.

9897697683656 is a deficient number, since it is larger than the sum of its proper divisors (8660586089284).

9897697683656 is a wasteful number, since it uses less digits than its factorization.

9897697683656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707744 (or 6707740 counting only the distinct ones).

The product of its digits is 44442639360, while the sum is 89.

The spelling of 9897697683656 in words is "nine trillion, eight hundred ninety-seven billion, six hundred ninety-seven million, six hundred eighty-three thousand, six hundred fifty-six".