90818364481 has 8 divisors (see below), whose sum is σ = 97872855080. Its totient is φ = 83773654272.

The previous prime is 90818364473. The next prime is 90818364487. The reversal of 90818364481 is 18446381809.

It can be written as a sum of positive squares in 4 ways, for example, as 15223611456 + 75594753025 = 123384^2 + 274945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90818364481 - 2³ = 90818364473 is a prime.

It is a super-2 number, since 2×90818364481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90818364487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425800 + ... + 2462953.

It is an arithmetic number, because the mean of its divisors is an integer number (12234106885).

Almost surely, 2^90818364481 is an apocalyptic number.

It is an amenable number.

90818364481 is a deficient number, since it is larger than the sum of its proper divisors (7054490599).

90818364481 is a wasteful number, since it uses less digits than its factorization.

90818364481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890195.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 90818364481 in words is "ninety billion, eight hundred eighteen million, three hundred sixty-four thousand, four hundred eighty-one".