814417235311681 has 4 divisors (see below), whose sum is σ = 814418812564164. Its totient is φ = 814415658059200.

The previous prime is 814417235311621. The next prime is 814417235311717. The reversal of 814417235311681 is 186113532714418.

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 496977447726081 + 317439787585600 = 22292991^2 + 17816840^2 .

It is a cyclic number.

It is not a de Polignac number, because 814417235311681 - 2²³ = 814417226923073 is a prime.

It is a super-2 number, since 2×814417235311681² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (814417235311621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787851460 + ... + 788884501.

It is an arithmetic number, because the mean of its divisors is an integer number (203604703141041).

Almost surely, 2^{814417235311681} is an apocalyptic number.

It is an amenable number.

814417235311681 is a deficient number, since it is larger than the sum of its proper divisors (1577252483).

814417235311681 is a wasteful number, since it uses less digits than its factorization.

814417235311681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577252482.

The product of its digits is 3870720, while the sum is 55.

The spelling of 814417235311681 in words is "eight hundred fourteen trillion, four hundred seventeen billion, two hundred thirty-five million, three hundred eleven thousand, six hundred eighty-one".