90987116420 has 24 divisors (see below), whose sum is σ = 191078817048. Its totient is φ = 36393728000.

The previous prime is 90987116411. The next prime is 90987116497. The reversal of 90987116420 is 2461178909.

It can be written as a sum of positive squares in 4 ways, for example, as 477597316 + 90509519104 = 21854^2 + 300848^2 .

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, 986270 + ... + 1074570.

It is an arithmetic number, because the mean of its divisors is an integer number (7961617377).

Almost surely, 2^90987116420 is an apocalyptic number.

It is an amenable number.

90987116420 is an abundant number, since it is smaller than the sum of its proper divisors (100091700628).

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

90987116420 is a wasteful number, since it uses less digits than its factorization.

90987116420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139831 (or 139829 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 90987116420 in words is "ninety billion, nine hundred eighty-seven million, one hundred sixteen thousand, four hundred twenty".