814237308985 has 4 divisors (see below), whose sum is σ = 977084770788. Its totient is φ = 651389847184.

The previous prime is 814237308977. The next prime is 814237309033. The reversal of 814237308985 is 589803732418.

It is a happy number.

814237308985 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, and also an emirpimes, since its reverse is a distinct semiprime: 589803732418 = 2 ⋅294901866209.

It can be written as a sum of positive squares in 2 ways, for example, as 487879898256 + 326357410729 = 698484^2 + 571277^2 .

It is a cyclic number.

It is not a de Polignac number, because 814237308985 - 2³ = 814237308977 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, 81423730894 + ... + 81423730903.

It is an arithmetic number, because the mean of its divisors is an integer number (244271192697).

Almost surely, 2^814237308985 is an apocalyptic number.

It is an amenable number.

814237308985 is a deficient number, since it is larger than the sum of its proper divisors (162847461803).

814237308985 is a wasteful number, since it uses less digits than its factorization.

814237308985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162847461802.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 814237308985 in words is "eight hundred fourteen billion, two hundred thirty-seven million, three hundred eight thousand, nine hundred eighty-five".