2678171961 has 8 divisors (see below), whose sum is σ = 3758837920. Its totient is φ = 1691476992.

The previous prime is 2678171927. The next prime is 2678171963. The reversal of 2678171961 is 1691718762.

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

It is not a de Polignac number, because 2678171961 - 2⁷ = 2678171833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2678171961.

It is not an unprimeable number, because it can be changed into a prime (2678171963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23492680 + ... + 23492793.

It is an arithmetic number, because the mean of its divisors is an integer number (469854740).

Almost surely, 2^2678171961 is an apocalyptic number.

It is an amenable number.

2678171961 is a deficient number, since it is larger than the sum of its proper divisors (1080665959).

2678171961 is a wasteful number, since it uses less digits than its factorization.

2678171961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46985495.

The product of its digits is 254016, while the sum is 48.

The square root of 2678171961 is about 51751.0575833963. The cubic root of 2678171961 is about 1388.7140187704.

The spelling of 2678171961 in words is "two billion, six hundred seventy-eight million, one hundred seventy-one thousand, nine hundred sixty-one".