816626452105 has 4 divisors (see below), whose sum is σ = 979951742532. Its totient is φ = 653301161680.

The previous prime is 816626452093. The next prime is 816626452127. The reversal of 816626452105 is 501254626618.

816626452105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188963220601 + 627663231504 = 434699^2 + 792252^2 .

It is not a de Polignac number, because 816626452105 - 2²³ = 816618063497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81662645206 + ... + 81662645215.

It is an arithmetic number, because the mean of its divisors is an integer number (244987935633).

Almost surely, 2^816626452105 is an apocalyptic number.

It is an amenable number.

816626452105 is a deficient number, since it is larger than the sum of its proper divisors (163325290427).

816626452105 is a wasteful number, since it uses less digits than its factorization.

816626452105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163325290426.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 816626452105 in words is "eight hundred sixteen billion, six hundred twenty-six million, four hundred fifty-two thousand, one hundred five".