9519870161 has 2 divisors, whose sum is σ = 9519870162. Its totient is φ = 9519870160.

The previous prime is 9519870149. The next prime is 9519870169. The reversal of 9519870161 is 1610789159.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9507225025 + 12645136 = 97505^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 9519870161 - 2⁶ = 9519870097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9519870169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4759935080 + 4759935081.

It is an arithmetic number, because the mean of its divisors is an integer number (4759935081).

Almost surely, 2^9519870161 is an apocalyptic number.

It is an amenable number.

9519870161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9519870161 is an equidigital number, since it uses as much as digits as its factorization.

9519870161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 47.

The square root of 9519870161 is about 97569.8219789295. The cubic root of 9519870161 is about 2119.3873690382.

The spelling of 9519870161 in words is "nine billion, five hundred nineteen million, eight hundred seventy thousand, one hundred sixty-one".