278048453779 has 2 divisors, whose sum is σ = 278048453780. Its totient is φ = 278048453778.

The previous prime is 278048453759. The next prime is 278048453827. The reversal of 278048453779 is 977354840872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278048453779 - 2⁵ = 278048453747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278048453779.

It is not a weakly prime, because it can be changed into another prime (278048453759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139024226889 + 139024226890.

It is an arithmetic number, because the mean of its divisors is an integer number (139024226890).

Almost surely, 2^278048453779 is an apocalyptic number.

278048453779 is a deficient number, since it is larger than the sum of its proper divisors (1).

278048453779 is an equidigital number, since it uses as much as digits as its factorization.

278048453779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94832640, while the sum is 64.

The spelling of 278048453779 in words is "two hundred seventy-eight billion, forty-eight million, four hundred fifty-three thousand, seven hundred seventy-nine".