16780161 has 8 divisors (see below), whose sum is σ = 22572000. Its totient is φ = 11087552.

The previous prime is 16780157. The next prime is 16780163. The reversal of 16780161 is 16108761.

It is a happy number.

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 16780161 - 2² = 16780157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16780163) 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, 24411 + ... + 25088.

It is an arithmetic number, because the mean of its divisors is an integer number (2821500).

Almost surely, 2^16780161 is an apocalyptic number.

It is an amenable number.

16780161 is a deficient number, since it is larger than the sum of its proper divisors (5791839).

16780161 is a wasteful number, since it uses less digits than its factorization.

16780161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49615.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 16780161 is about 4096.3594812956. The cubic root of 16780161 is about 256.0149781682.

The spelling of 16780161 in words is "sixteen million, seven hundred eighty thousand, one hundred sixty-one".