90670221078881 has 2 divisors, whose sum is σ = 90670221078882. Its totient is φ = 90670221078880.

The previous prime is 90670221078869. The next prime is 90670221078883. The reversal of 90670221078881 is 18887012207609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89741821382656 + 928399696225 = 9473216^2 + 963535^2 .

It is a cyclic number.

It is not a de Polignac number, because 90670221078881 - 2³⁴ = 90653041209697 is a prime.

It is a super-2 number, since 2×90670221078881² (a number of 29 digits) contains 22 as substring.

Together with 90670221078883, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90670221078881.

It is not a weakly prime, because it can be changed into another prime (90670221078883) 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, 45335110539440 + 45335110539441.

It is an arithmetic number, because the mean of its divisors is an integer number (45335110539441).

Almost surely, 2^{90670221078881} is an apocalyptic number.

It is an amenable number.

90670221078881 is a deficient number, since it is larger than the sum of its proper divisors (1).

90670221078881 is an equidigital number, since it uses as much as digits as its factorization.

90670221078881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 59.

The spelling of 90670221078881 in words is "ninety trillion, six hundred seventy billion, two hundred twenty-one million, seventy-eight thousand, eight hundred eighty-one".