816826154418 has 16 divisors (see below), whose sum is σ = 1815169232160. Its totient is φ = 272275384788.

The previous prime is 816826154411. The next prime is 816826154437. The reversal of 816826154418 is 814451628618.

816826154418 is a `hidden beast` number, since 8 + 1 + 6 + 8 + 2 + 615 + 4 + 4 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 15126410267 = 816826154418 / (8 + 1 + 6 + 8 + 2 + 6 + 1 + 5 + 4 + 4 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (816826154411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7563205080 + ... + 7563205187.

It is an arithmetic number, because the mean of its divisors is an integer number (113448077010).

Almost surely, 2^816826154418 is an apocalyptic number.

816826154418 is an abundant number, since it is smaller than the sum of its proper divisors (998343077742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816826154418 is a wasteful number, since it uses less digits than its factorization.

816826154418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15126410278 (or 15126410272 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The spelling of 816826154418 in words is "eight hundred sixteen billion, eight hundred twenty-six million, one hundred fifty-four thousand, four hundred eighteen".