278348616113 has 2 divisors, whose sum is σ = 278348616114. Its totient is φ = 278348616112.

The previous prime is 278348616103. The next prime is 278348616121. The reversal of 278348616113 is 311616843872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276288999424 + 2059616689 = 525632^2 + 45383^2 .

It is a cyclic number.

It is not a de Polignac number, because 278348616113 - 2¹⁴ = 278348599729 is a prime.

It is not a weakly prime, because it can be changed into another prime (278348616103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139174308056 + 139174308057.

It is an arithmetic number, because the mean of its divisors is an integer number (139174308057).

Almost surely, 2^278348616113 is an apocalyptic number.

It is an amenable number.

278348616113 is a deficient number, since it is larger than the sum of its proper divisors (1).

278348616113 is an equidigital number, since it uses as much as digits as its factorization.

278348616113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The spelling of 278348616113 in words is "two hundred seventy-eight billion, three hundred forty-eight million, six hundred sixteen thousand, one hundred thirteen".