9980957837161 has 2 divisors, whose sum is σ = 9980957837162. Its totient is φ = 9980957837160.

The previous prime is 9980957837117. The next prime is 9980957837269. The reversal of 9980957837161 is 1617387590899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8720468865936 + 1260488971225 = 2953044^2 + 1122715^2 .

It is a cyclic number.

It is not a de Polignac number, because 9980957837161 - 2⁹ = 9980957836649 is a prime.

It is not a weakly prime, because it can be changed into another prime (9980957337161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990478918580 + 4990478918581.

It is an arithmetic number, because the mean of its divisors is an integer number (4990478918581).

Almost surely, 2^{9980957837161} is an apocalyptic number.

It is an amenable number.

9980957837161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9980957837161 is an equidigital number, since it uses as much as digits as its factorization.

9980957837161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205752960, while the sum is 73.

The spelling of 9980957837161 in words is "nine trillion, nine hundred eighty billion, nine hundred fifty-seven million, eight hundred thirty-seven thousand, one hundred sixty-one".