9501920161 has 4 divisors (see below), whose sum is σ = 9758728852. Its totient is φ = 9245111472.

The previous prime is 9501920147. The next prime is 9501920173. The reversal of 9501920161 is 1610291059.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8314704225 + 1187215936 = 91185^2 + 34456^2 .

It is a cyclic number.

It is not a de Polignac number, because 9501920161 - 2⁷ = 9501920033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9501920861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128404290 + ... + 128404363.

It is an arithmetic number, because the mean of its divisors is an integer number (2439682213).

Almost surely, 2^9501920161 is an apocalyptic number.

It is an amenable number.

9501920161 is a deficient number, since it is larger than the sum of its proper divisors (256808691).

9501920161 is a wasteful number, since it uses less digits than its factorization.

9501920161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256808690.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 9501920161 is about 97477.7931684956. The cubic root of 9501920161 is about 2118.0544748525.

The spelling of 9501920161 in words is "nine billion, five hundred one million, nine hundred twenty thousand, one hundred sixty-one".