8180993407 has 4 divisors (see below), whose sum is σ = 8181237160. Its totient is φ = 8180749656.

The previous prime is 8180993369. The next prime is 8180993411. The reversal of 8180993407 is 7043990818.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7043990818 = 2 ⋅3521995409.

It is a cyclic number.

It is not a de Polignac number, because 8180993407 - 2²³ = 8172604799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8180993437) 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 3 ways as a sum of consecutive naturals, for example, 61593 + ... + 141970.

It is an arithmetic number, because the mean of its divisors is an integer number (2045309290).

Almost surely, 2^8180993407 is an apocalyptic number.

8180993407 is a deficient number, since it is larger than the sum of its proper divisors (243753).

8180993407 is a wasteful number, since it uses less digits than its factorization.

8180993407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243752.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 8180993407 is about 90448.8441440796. The cubic root of 8180993407 is about 2014.9704471813.

The spelling of 8180993407 in words is "eight billion, one hundred eighty million, nine hundred ninety-three thousand, four hundred seven".