8180379865 has 16 divisors (see below), whose sum is σ = 11220289920. Its totient is φ = 5608661760.

The previous prime is 8180379863. The next prime is 8180379869. The reversal of 8180379865 is 5689730818.

It is not a de Polignac number, because 8180379865 - 2¹ = 8180379863 is a prime.

It is a super-2 number, since 2×8180379865² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8180379863) 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 15 ways as a sum of consecutive naturals, for example, 453825 + ... + 471505.

It is an arithmetic number, because the mean of its divisors is an integer number (701268120).

Almost surely, 2^8180379865 is an apocalyptic number.

It is an amenable number.

8180379865 is a deficient number, since it is larger than the sum of its proper divisors (3039910055).

8180379865 is a wasteful number, since it uses less digits than its factorization.

8180379865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30912.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 8180379865 is about 90445.4524285218. The cubic root of 8180379865 is about 2014.9200743296.

The spelling of 8180379865 in words is "eight billion, one hundred eighty million, three hundred seventy-nine thousand, eight hundred sixty-five".