8158213518 has 128 divisors (see below), whose sum is σ = 20947476480. Its totient is φ = 2060328960.

The previous prime is 8158213501. The next prime is 8158213523. The reversal of 8158213518 is 8153128518.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 8158213518.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 1639338 + ... + 1644306.

It is an arithmetic number, because the mean of its divisors is an integer number (163652160).

Almost surely, 2^8158213518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8158213518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10473738240).

8158213518 is an abundant number, since it is smaller than the sum of its proper divisors (12789262962).

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

8158213518 is a wasteful number, since it uses less digits than its factorization.

8158213518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122.

The product of its digits is 76800, while the sum is 42.

The square root of 8158213518 is about 90322.8294397380. The cubic root of 8158213518 is about 2013.0984873716.

The spelling of 8158213518 in words is "eight billion, one hundred fifty-eight million, two hundred thirteen thousand, five hundred eighteen".