2251127778 has 8 divisors (see below), whose sum is σ = 4502255568. Its totient is φ = 750375924.

The previous prime is 2251127741. The next prime is 2251127789. The reversal of 2251127778 is 8777211522.

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

2251127778 is an admirable 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, 187593976 + ... + 187593987.

It is an arithmetic number, because the mean of its divisors is an integer number (562781946).

Almost surely, 2^2251127778 is an apocalyptic number.

2251127778 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.

2251127778 is a wasteful number, since it uses less digits than its factorization.

2251127778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375187968.

The product of its digits is 109760, while the sum is 42.

The square root of 2251127778 is about 47446.0512371683. The cubic root of 2251127778 is about 1310.5895949420.

The spelling of 2251127778 in words is "two billion, two hundred fifty-one million, one hundred twenty-seven thousand, seven hundred seventy-eight".