9807797403538 has 32 divisors (see below), whose sum is σ = 15299729544960. Its totient is φ = 4711830963840.

The previous prime is 9807797403533. The next prime is 9807797403557. The reversal of 9807797403538 is 8353047977089.

It is a happy number.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9807797403533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664945 + ... + 4478587.

It is an arithmetic number, because the mean of its divisors is an integer number (478116548280).

Almost surely, 2^{9807797403538} is an apocalyptic number.

9807797403538 is a deficient number, since it is larger than the sum of its proper divisors (5491932141422).

9807797403538 is a wasteful number, since it uses less digits than its factorization.

9807797403538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814162.

The product of its (nonzero) digits is 320060160, while the sum is 70.

The spelling of 9807797403538 in words is "nine trillion, eight hundred seven billion, seven hundred ninety-seven million, four hundred three thousand, five hundred thirty-eight".