812540273211 has 16 divisors (see below), whose sum is σ = 1205988460320. Its totient is φ = 540692223840.

The previous prime is 812540273179. The next prime is 812540273213. The reversal of 812540273211 is 112372045218.

812540273211 is a `hidden beast` number, since 81 + 2 + 540 + 2 + 7 + 32 + 1 + 1 = 666.

It is not a de Polignac number, because 812540273211 - 2⁵ = 812540273179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812540273213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27798780 + ... + 27827993.

It is an arithmetic number, because the mean of its divisors is an integer number (75374278770).

Almost surely, 2^812540273211 is an apocalyptic number.

812540273211 is a deficient number, since it is larger than the sum of its proper divisors (393448187109).

812540273211 is a wasteful number, since it uses less digits than its factorization.

812540273211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55627323 (or 55627317 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 812540273211 in words is "eight hundred twelve billion, five hundred forty million, two hundred seventy-three thousand, two hundred eleven".