90365805851 has 2 divisors, whose sum is σ = 90365805852. Its totient is φ = 90365805850.

The previous prime is 90365805841. The next prime is 90365805853. The reversal of 90365805851 is 15850856309.

It is a strong prime.

It is an emirp because it is prime and its reverse (15850856309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90365805851 - 2¹⁴ = 90365789467 is a prime.

Together with 90365805853, 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 90365805851.

It is not a weakly prime, because it can be changed into another prime (90365805853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45182902925 + 45182902926.

It is an arithmetic number, because the mean of its divisors is an integer number (45182902926).

Almost surely, 2^90365805851 is an apocalyptic number.

90365805851 is a deficient number, since it is larger than the sum of its proper divisors (1).

90365805851 is an equidigital number, since it uses as much as digits as its factorization.

90365805851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 90365805851 in words is "ninety billion, three hundred sixty-five million, eight hundred five thousand, eight hundred fifty-one".