4278204458978 has 6 divisors (see below), whose sum is σ = 6417311076171. Its totient is φ = 2139100766922.

The previous prime is 4278204458953. The next prime is 4278204458987. The reversal of 4278204458978 is 8798544028724.

It can be written as a sum of positive squares in only one way, i.e., 2139102229489 + 2139102229489 = 1462567^2 + 1462567^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1462567.

It is a Duffinian number.

It is an unprimeable number.

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 in 2 ways as a sum of consecutive naturals, for example, 2193851 + ... + 3656417.

Almost surely, 2^{4278204458978} is an apocalyptic number.

4278204458978 is a deficient number, since it is larger than the sum of its proper divisors (2139106617193).

4278204458978 is an frugal number, since it uses more digits than its factorization.

4278204458978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925136 (or 1462569 counting only the distinct ones).

The product of its (nonzero) digits is 289013760, while the sum is 68.

The spelling of 4278204458978 in words is "four trillion, two hundred seventy-eight billion, two hundred four million, four hundred fifty-eight thousand, nine hundred seventy-eight".