819822462181 has 8 divisors (see below), whose sum is σ = 835266426264. Its totient is φ = 804522163200.

The previous prime is 819822462119. The next prime is 819822462197. The reversal of 819822462181 is 181264228918.

819822462181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 216256621156 + 603565841025 = 465034^2 + 776895^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 819822462181 - 2¹⁷ = 819822331109 is a prime.

It is a super-2 number, since 2×819822462181² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819822462101) 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, 35904756 + ... + 35927581.

It is an arithmetic number, because the mean of its divisors is an integer number (104408303283).

Almost surely, 2^819822462181 is an apocalyptic number.

It is an amenable number.

819822462181 is a deficient number, since it is larger than the sum of its proper divisors (15443964083).

819822462181 is a wasteful number, since it uses less digits than its factorization.

819822462181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71832551.

The product of its digits is 884736, while the sum is 52.

The spelling of 819822462181 in words is "eight hundred nineteen billion, eight hundred twenty-two million, four hundred sixty-two thousand, one hundred eighty-one".