4878122790251 has 2 divisors, whose sum is σ = 4878122790252. Its totient is φ = 4878122790250.

The previous prime is 4878122790239. The next prime is 4878122790253. The reversal of 4878122790251 is 1520972218784.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4878122790251 is a prime.

Together with 4878122790253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4878122790253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2439061395125 + 2439061395126.

It is an arithmetic number, because the mean of its divisors is an integer number (2439061395126).

Almost surely, 2^{4878122790251} is an apocalyptic number.

4878122790251 is a deficient number, since it is larger than the sum of its proper divisors (1).

4878122790251 is an equidigital number, since it uses as much as digits as its factorization.

4878122790251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 4878122790251 in words is "four trillion, eight hundred seventy-eight billion, one hundred twenty-two million, seven hundred ninety thousand, two hundred fifty-one".