9780123161 has 8 divisors (see below), whose sum is σ = 10088708160. Its totient is φ = 9473867568.

The previous prime is 9780123151. The next prime is 9780123163. The reversal of 9780123161 is 1613210879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9780123161 - 2¹⁰ = 9780122137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9780123163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573821 + ... + 590618.

It is an arithmetic number, because the mean of its divisors is an integer number (1261088520).

Almost surely, 2^9780123161 is an apocalyptic number.

It is an amenable number.

9780123161 is a deficient number, since it is larger than the sum of its proper divisors (308584999).

9780123161 is a wasteful number, since it uses less digits than its factorization.

9780123161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164703.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 9780123161 is about 98894.5052113615. The cubic root of 9780123161 is about 2138.5271812649.

The spelling of 9780123161 in words is "nine billion, seven hundred eighty million, one hundred twenty-three thousand, one hundred sixty-one".