90278806715659 has 2 divisors, whose sum is σ = 90278806715660. Its totient is φ = 90278806715658.

The previous prime is 90278806715557. The next prime is 90278806715677. The reversal of 90278806715659 is 95651760887209.

It is a strong prime.

It is an emirp because it is prime and its reverse (95651760887209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90278806715659 - 2³⁵ = 90244446977291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90278806715591 and 90278806715600.

It is not a weakly prime, because it can be changed into another prime (90278806725659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45139403357829 + 45139403357830.

It is an arithmetic number, because the mean of its divisors is an integer number (45139403357830).

Almost surely, 2^{90278806715659} is an apocalyptic number.

90278806715659 is a deficient number, since it is larger than the sum of its proper divisors (1).

90278806715659 is an equidigital number, since it uses as much as digits as its factorization.

90278806715659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 457228800, while the sum is 73.

The spelling of 90278806715659 in words is "ninety trillion, two hundred seventy-eight billion, eight hundred six million, seven hundred fifteen thousand, six hundred fifty-nine".