8161286550 has 24 divisors (see below), whose sum is σ = 20239991016. Its totient is φ = 2176343040.

The previous prime is 8161286533. The next prime is 8161286557. The reversal of 8161286550 is 556821618.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161286557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27204139 + ... + 27204438.

It is an arithmetic number, because the mean of its divisors is an integer number (843332959).

Almost surely, 2^8161286550 is an apocalyptic number.

8161286550 is an abundant number, since it is smaller than the sum of its proper divisors (12078704466).

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

8161286550 is a wasteful number, since it uses less digits than its factorization.

8161286550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54408592 (or 54408587 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 8161286550 is about 90339.8392183648. The cubic root of 8161286550 is about 2013.3512199691.

The spelling of 8161286550 in words is "eight billion, one hundred sixty-one million, two hundred eighty-six thousand, five hundred fifty".