916812599405 has 4 divisors (see below), whose sum is σ = 1100175119292. Its totient is φ = 733450079520.

The previous prime is 916812599399. The next prime is 916812599413. The reversal of 916812599405 is 504995218619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504995218619 = 23 ⋅21956313853.

It can be written as a sum of positive squares in 2 ways, for example, as 720157601641 + 196654997764 = 848621^2 + 443458^2 .

It is not a de Polignac number, because 916812599405 - 2¹⁰ = 916812598381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 91681259936 + ... + 91681259945.

It is an arithmetic number, because the mean of its divisors is an integer number (275043779823).

Almost surely, 2^916812599405 is an apocalyptic number.

It is an amenable number.

916812599405 is a deficient number, since it is larger than the sum of its proper divisors (183362519887).

916812599405 is a wasteful number, since it uses less digits than its factorization.

916812599405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183362519886.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The spelling of 916812599405 in words is "nine hundred sixteen billion, eight hundred twelve million, five hundred ninety-nine thousand, four hundred five".