90005405540 has 48 divisors (see below), whose sum is σ = 200194872192. Its totient is φ = 33873348096.

The previous prime is 90005405527. The next prime is 90005405551. The reversal of 90005405540 is 4550450009.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90005405497 and 90005405506.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1042049 + ... + 1125111.

It is an arithmetic number, because the mean of its divisors is an integer number (4170726504).

Almost surely, 2^90005405540 is an apocalyptic number.

It is an amenable number.

90005405540 is an abundant number, since it is smaller than the sum of its proper divisors (110189466652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90005405540 is a wasteful number, since it uses less digits than its factorization.

90005405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86276 (or 86274 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 90005405540 its reverse (4550450009), we get a palindrome (94555855549).

The spelling of 90005405540 in words is "ninety billion, five million, four hundred five thousand, five hundred forty".