818143640511 has 16 divisors (see below), whose sum is σ = 1092966710400. Its totient is φ = 544375042848.

The previous prime is 818143640497. The next prime is 818143640527. The reversal of 818143640511 is 115046341818.

It is not a de Polignac number, because 818143640511 - 2¹⁹ = 818143116223 is a prime.

It is a super-2 number, since 2×818143640511² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818143640011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20688025 + ... + 20727533.

It is an arithmetic number, because the mean of its divisors is an integer number (68310419400).

Almost surely, 2^818143640511 is an apocalyptic number.

818143640511 is a deficient number, since it is larger than the sum of its proper divisors (274823069889).

818143640511 is a wasteful number, since it uses less digits than its factorization.

818143640511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52678.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 818143640511 in words is "eight hundred eighteen billion, one hundred forty-three million, six hundred forty thousand, five hundred eleven".