8499138650550 has 144 divisors (see below), whose sum is σ = 23225613465600. Its totient is φ = 2227876643520.

The previous prime is 8499138650543. The next prime is 8499138650557. The reversal of 8499138650550 is 550568319948.

8499138650550 is a `hidden beast` number, since 8 + 4 + 9 + 9 + 13 + 8 + 65 + 0 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (8499138650543) and next prime (8499138650557).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8499138650557) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6860907 + ... + 8004393.

It is an arithmetic number, because the mean of its divisors is an integer number (161288982400).

Almost surely, 2^{8499138650550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8499138650550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11612806732800).

8499138650550 is an abundant number, since it is smaller than the sum of its proper divisors (14726474815050).

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

8499138650550 is a wasteful number, since it uses less digits than its factorization.

8499138650550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143787 (or 1143779 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 63.

The spelling of 8499138650550 in words is "eight trillion, four hundred ninety-nine billion, one hundred thirty-eight million, six hundred fifty thousand, five hundred fifty".