278055055049 has 4 divisors (see below), whose sum is σ = 278089591236. Its totient is φ = 278020518864.

The previous prime is 278055055043. The next prime is 278055055073. The reversal of 278055055049 is 940550550872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128310822025 + 149744233024 = 358205^2 + 386968^2 .

It is a cyclic number.

It is not a de Polignac number, because 278055055049 - 2⁸ = 278055054793 is a prime.

It is a super-2 number, since 2×278055055049² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278055054988 and 278055055006.

It is not an unprimeable number, because it can be changed into a prime (278055055043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17256014 + ... + 17272119.

It is an arithmetic number, because the mean of its divisors is an integer number (69522397809).

Almost surely, 2^278055055049 is an apocalyptic number.

It is an amenable number.

278055055049 is a deficient number, since it is larger than the sum of its proper divisors (34536187).

278055055049 is an equidigital number, since it uses as much as digits as its factorization.

278055055049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34536186.

The product of its (nonzero) digits is 2520000, while the sum is 50.

The spelling of 278055055049 in words is "two hundred seventy-eight billion, fifty-five million, fifty-five thousand, forty-nine".