90005405550 has 48 divisors (see below), whose sum is σ = 223236664320. Its totient is φ = 23998940640.

The previous prime is 90005405527. The next prime is 90005405551. The reversal of 90005405550 is 5550450009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90005405551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1750509 + ... + 1801191.

It is an arithmetic number, because the mean of its divisors is an integer number (4650763840).

Almost surely, 2^90005405550 is an apocalyptic number.

90005405550 is an abundant number, since it is smaller than the sum of its proper divisors (133231258770).

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

90005405550 is a wasteful number, since it uses less digits than its factorization.

90005405550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62537 (or 62532 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 90005405550 its reverse (5550450009), we get a palindrome (95555855559).

The spelling of 90005405550 in words is "ninety billion, five million, four hundred five thousand, five hundred fifty".