2122779278 has 8 divisors (see below), whose sum is σ = 3184800672. Its totient is φ = 1061179056.

The previous prime is 2122779277. The next prime is 2122779289. The reversal of 2122779278 is 8729772212.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122779277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92375 + ... + 113042.

It is an arithmetic number, because the mean of its divisors is an integer number (398100084).

Almost surely, 2^2122779278 is an apocalyptic number.

2122779278 is a deficient number, since it is larger than the sum of its proper divisors (1062021394).

2122779278 is a wasteful number, since it uses less digits than its factorization.

2122779278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210586.

The product of its digits is 395136, while the sum is 47.

The square root of 2122779278 is about 46073.6288781337. The cubic root of 2122779278 is about 1285.1927881246.

The spelling of 2122779278 in words is "two billion, one hundred twenty-two million, seven hundred seventy-nine thousand, two hundred seventy-eight".