90378488225 has 12 divisors (see below), whose sum is σ = 112401885804. Its totient is φ = 72088235520.

The previous prime is 90378488219. The next prime is 90378488227. The reversal of 90378488225 is 52288487309.

It can be written as a sum of positive squares in 6 ways, for example, as 12150873361 + 78227614864 = 110231^2 + 279692^2 .

It is not a de Polignac number, because 90378488225 - 2³⁶ = 21659011489 is a prime.

It is a super-2 number, since 2×90378488225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90378488227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5355284 + ... + 5372133.

It is an arithmetic number, because the mean of its divisors is an integer number (9366823817).

Almost surely, 2^90378488225 is an apocalyptic number.

It is an amenable number.

90378488225 is a deficient number, since it is larger than the sum of its proper divisors (22023397579).

90378488225 is a wasteful number, since it uses less digits than its factorization.

90378488225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10727764 (or 10727759 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 90378488225 in words is "ninety billion, three hundred seventy-eight million, four hundred eighty-eight thousand, two hundred twenty-five".