2678516161 has 8 divisors (see below), whose sum is σ = 2768572800. Its totient is φ = 2589948240.

The previous prime is 2678516153. The next prime is 2678516177. The reversal of 2678516161 is 1616158762.

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 2678516161 - 2³ = 2678516153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678516111) 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, 368521 + ... + 375718.

It is an arithmetic number, because the mean of its divisors is an integer number (346071600).

Almost surely, 2^2678516161 is an apocalyptic number.

It is an amenable number.

2678516161 is a deficient number, since it is larger than the sum of its proper divisors (90056639).

2678516161 is an equidigital number, since it uses as much as digits as its factorization.

2678516161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744359.

The product of its digits is 120960, while the sum is 43.

The square root of 2678516161 is about 51754.3830124561. The cubic root of 2678516161 is about 1388.7735089620.

The spelling of 2678516161 in words is "two billion, six hundred seventy-eight million, five hundred sixteen thousand, one hundred sixty-one".