616840161 has 16 divisors (see below), whose sum is σ = 946713600. Its totient is φ = 349942608.

The previous prime is 616840099. The next prime is 616840163. The reversal of 616840161 is 161048616.

It is not a de Polignac number, because 616840161 - 2⁷ = 616840033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616840163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102741 + ... + 108578.

It is an arithmetic number, because the mean of its divisors is an integer number (59169600).

Almost surely, 2^616840161 is an apocalyptic number.

It is an amenable number.

616840161 is a deficient number, since it is larger than the sum of its proper divisors (329873439).

616840161 is a wasteful number, since it uses less digits than its factorization.

616840161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211468.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 616840161 is about 24836.2670504245. The cubic root of 616840161 is about 851.2508278610.

Adding to 616840161 its reverse (161048616), we get a palindrome (777888777).

The spelling of 616840161 in words is "six hundred sixteen million, eight hundred forty thousand, one hundred sixty-one".