812538670343085 has 24 divisors (see below), whose sum is σ = 1609600413632640. Its totient is φ = 371446249299552.

The previous prime is 812538670343083. The next prime is 812538670343089. The reversal of 812538670343085 is 580343076835218.

812538670343085 is a `hidden beast` number, since 8 + 1 + 2 + 53 + 8 + 6 + 70 + 3 + 430 + 85 = 666.

It is not a de Polignac number, because 812538670343085 - 2¹ = 812538670343083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812538670343083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1289743920865 + ... + 1289743921494.

It is an arithmetic number, because the mean of its divisors is an integer number (67066683901360).

Almost surely, 2^{812538670343085} is an apocalyptic number.

It is an amenable number.

812538670343085 is a deficient number, since it is larger than the sum of its proper divisors (797061743289555).

812538670343085 is a wasteful number, since it uses less digits than its factorization.

812538670343085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579487842377 (or 2579487842374 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 63.

The spelling of 812538670343085 in words is "eight hundred twelve trillion, five hundred thirty-eight billion, six hundred seventy million, three hundred forty-three thousand, eighty-five".