4278374271949 has 2 divisors, whose sum is σ = 4278374271950. Its totient is φ = 4278374271948.

The previous prime is 4278374271917. The next prime is 4278374271989. The reversal of 4278374271949 is 9491724738724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3178707449449 + 1099666822500 = 1782893^2 + 1048650^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278374271949 - 2⁵ = 4278374271917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278374271989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139187135974 + 2139187135975.

It is an arithmetic number, because the mean of its divisors is an integer number (2139187135975).

Almost surely, 2^{4278374271949} is an apocalyptic number.

It is an amenable number.

4278374271949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278374271949 is an equidigital number, since it uses as much as digits as its factorization.

4278374271949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170698752, while the sum is 67.

The spelling of 4278374271949 in words is "four trillion, two hundred seventy-eight billion, three hundred seventy-four million, two hundred seventy-one thousand, nine hundred forty-nine".