90506887185 has 128 divisors (see below), whose sum is σ = 172078792704. Its totient is φ = 40044533760.

The previous prime is 90506887171. The next prime is 90506887187. The reversal of 90506887185 is 58178860509.

It is a happy number.

It is not a de Polignac number, because 90506887185 - 2⁴ = 90506887169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90506887187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 124493292 + ... + 124494018.

It is an arithmetic number, because the mean of its divisors is an integer number (1344365568).

Almost surely, 2^90506887185 is an apocalyptic number.

It is an amenable number.

90506887185 is a deficient number, since it is larger than the sum of its proper divisors (81571905519).

90506887185 is a wasteful number, since it uses less digits than its factorization.

90506887185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 4838400, while the sum is 57.

The spelling of 90506887185 in words is "ninety billion, five hundred six million, eight hundred eighty-seven thousand, one hundred eighty-five".