278471043049 has 2 divisors, whose sum is σ = 278471043050. Its totient is φ = 278471043048.

The previous prime is 278471043017. The next prime is 278471043073. The reversal of 278471043049 is 940340174872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275789874649 + 2681168400 = 525157^2 + 51780^2 .

It is a cyclic number.

It is not a de Polignac number, because 278471043049 - 2⁵ = 278471043017 is a prime.

It is a super-2 number, since 2×278471043049² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 278471042993 and 278471043011.

It is not a weakly prime, because it can be changed into another prime (278471043089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139235521524 + 139235521525.

It is an arithmetic number, because the mean of its divisors is an integer number (139235521525).

Almost surely, 2^278471043049 is an apocalyptic number.

It is an amenable number.

278471043049 is a deficient number, since it is larger than the sum of its proper divisors (1).

278471043049 is an equidigital number, since it uses as much as digits as its factorization.

278471043049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 278471043049 in words is "two hundred seventy-eight billion, four hundred seventy-one million, forty-three thousand, forty-nine".