2265401278 has 16 divisors (see below), whose sum is σ = 3900509280. Its totient is φ = 966645216.

The previous prime is 2265401273. The next prime is 2265401279. The reversal of 2265401278 is 8721045622.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265401273) 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, 350101 + ... + 356512.

It is an arithmetic number, because the mean of its divisors is an integer number (243781830).

Almost surely, 2^2265401278 is an apocalyptic number.

2265401278 is a deficient number, since it is larger than the sum of its proper divisors (1635108002).

2265401278 is a wasteful number, since it uses less digits than its factorization.

2265401278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706851.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 2265401278 is about 47596.2317626091. The cubic root of 2265401278 is about 1313.3537356864.

The spelling of 2265401278 in words is "two billion, two hundred sixty-five million, four hundred one thousand, two hundred seventy-eight".