8158185801 has 12 divisors (see below), whose sum is σ = 11916452340. Its totient is φ = 5377680000.

The previous prime is 8158185799. The next prime is 8158185821. The reversal of 8158185801 is 1085818518.

8158185801 is a `hidden beast` number, since 8 + 1 + 58 + 18 + 580 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2753730576 + 5404455225 = 52476^2 + 73515^2 .

It is not a de Polignac number, because 8158185801 - 2¹ = 8158185799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8158185821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5091700 + ... + 5093301.

It is an arithmetic number, because the mean of its divisors is an integer number (993037695).

Almost surely, 2^8158185801 is an apocalyptic number.

It is an amenable number.

8158185801 is a deficient number, since it is larger than the sum of its proper divisors (3758266539).

8158185801 is a wasteful number, since it uses less digits than its factorization.

8158185801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185096 (or 10185093 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 45.

The square root of 8158185801 is about 90322.6760066374. The cubic root of 8158185801 is about 2013.0962075786.

The spelling of 8158185801 in words is "eight billion, one hundred fifty-eight million, one hundred eighty-five thousand, eight hundred one".