90005615506 has 16 divisors (see below), whose sum is σ = 139694918040. Its totient is φ = 43441332480.

The previous prime is 90005615489. The next prime is 90005615519. The reversal of 90005615506 is 60551650009.

It can be written as a sum of positive squares in 4 ways, for example, as 81305389881 + 8700225625 = 285141^2 + 93275^2 .

It is a super-2 number, since 2×90005615506² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 94420 + ... + 434656.

Almost surely, 2^90005615506 is an apocalyptic number.

90005615506 is a deficient number, since it is larger than the sum of its proper divisors (49689302534).

90005615506 is a wasteful number, since it uses less digits than its factorization.

90005615506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344829.

The product of its (nonzero) digits is 40500, while the sum is 37.

The spelling of 90005615506 in words is "ninety billion, five million, six hundred fifteen thousand, five hundred six".