2278890078497 has 2 divisors, whose sum is σ = 2278890078498. Its totient is φ = 2278890078496.

The previous prime is 2278890078467. The next prime is 2278890078533. The reversal of 2278890078497 is 7948700988722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2257518270016 + 21371808481 = 1502504^2 + 146191^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278890078497 - 2¹⁶ = 2278890012961 is a prime.

It is a super-4 number, since 4×2278890078497⁴ (a number of 51 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2278890078497.

It is not a weakly prime, because it can be changed into another prime (2278890078467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139445039248 + 1139445039249.

It is an arithmetic number, because the mean of its divisors is an integer number (1139445039249).

Almost surely, 2^{2278890078497} is an apocalyptic number.

It is an amenable number.

2278890078497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278890078497 is an equidigital number, since it uses as much as digits as its factorization.

2278890078497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 227598336, while the sum is 71.

The spelling of 2278890078497 in words is "two trillion, two hundred seventy-eight billion, eight hundred ninety million, seventy-eight thousand, four hundred ninety-seven".