2778161622 has 8 divisors (see below), whose sum is σ = 5556323256. Its totient is φ = 926053872.

The previous prime is 2778161593. The next prime is 2778161647. The reversal of 2778161622 is 2261618772.

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

2778161622 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 231513463 + ... + 231513474.

It is an arithmetic number, because the mean of its divisors is an integer number (694540407).

Almost surely, 2^2778161622 is an apocalyptic number.

2778161622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2778161622 is a wasteful number, since it uses less digits than its factorization.

2778161622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463026942.

The product of its digits is 112896, while the sum is 42.

The square root of 2778161622 is about 52708.2690097104. The cubic root of 2778161622 is about 1405.7858552051.

The spelling of 2778161622 in words is "two billion, seven hundred seventy-eight million, one hundred sixty-one thousand, six hundred twenty-two".