811212044413 has 8 divisors (see below), whose sum is σ = 838728221400. Its totient is φ = 783990158400.

The previous prime is 811212044329. The next prime is 811212044441. The reversal of 811212044413 is 314440212118.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 83565511929 + 727646532484 = 289077^2 + 853022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 811212044413 - 2²⁹ = 810675173501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811212044213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 73567138 + ... + 73578163.

It is an arithmetic number, because the mean of its divisors is an integer number (104841027675).

Almost surely, 2^811212044413 is an apocalyptic number.

It is an amenable number.

811212044413 is a deficient number, since it is larger than the sum of its proper divisors (27516176987).

811212044413 is a wasteful number, since it uses less digits than its factorization.

811212044413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147145487.

The product of its (nonzero) digits is 6144, while the sum is 31.

The spelling of 811212044413 in words is "eight hundred eleven billion, two hundred twelve million, forty-four thousand, four hundred thirteen".