8153418181 has 4 divisors (see below), whose sum is σ = 8155194112. Its totient is φ = 8151642252.

The previous prime is 8153418151. The next prime is 8153418191. The reversal of 8153418181 is 1818143518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8153418181 - 2¹³ = 8153409989 is a prime.

It is a super-2 number, since 2×8153418181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8153418151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881061 + ... + 890266.

It is an arithmetic number, because the mean of its divisors is an integer number (2038798528).

Almost surely, 2^8153418181 is an apocalyptic number.

It is an amenable number.

8153418181 is a deficient number, since it is larger than the sum of its proper divisors (1775931).

8153418181 is a wasteful number, since it uses less digits than its factorization.

8153418181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775930.

The product of its digits is 30720, while the sum is 40.

The square root of 8153418181 is about 90296.2799953575. The cubic root of 8153418181 is about 2012.7039819784.

The spelling of 8153418181 in words is "eight billion, one hundred fifty-three million, four hundred eighteen thousand, one hundred eighty-one".