90875223842 has 54 divisors (see below), whose sum is σ = 155963308977. Its totient is φ = 39688872912.

The previous prime is 90875223833. The next prime is 90875223883. The reversal of 90875223842 is 24832257809.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77701005001 + 13174218841 = 278749^2 + 114779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213161.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 105301103 + ... + 105301965.

Almost surely, 2^90875223842 is an apocalyptic number.

90875223842 is a deficient number, since it is larger than the sum of its proper divisors (65088085135).

90875223842 is an equidigital number, since it uses as much as digits as its factorization.

90875223842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

Multiplying 90875223842 by its sum of digits (50), we get a square (4543761192100 = 2131610²).

The spelling of 90875223842 in words is "ninety billion, eight hundred seventy-five million, two hundred twenty-three thousand, eight hundred forty-two".