811542316197 has 4 divisors (see below), whose sum is σ = 1082056421600. Its totient is φ = 541028210796.

The previous prime is 811542316187. The next prime is 811542316201. The reversal of 811542316197 is 791613245118.

811542316197 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 811542316197 - 2⁶ = 811542316133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811542316187) 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, 135257052697 + ... + 135257052702.

It is an arithmetic number, because the mean of its divisors is an integer number (270514105400).

Almost surely, 2^811542316197 is an apocalyptic number.

It is an amenable number.

811542316197 is a deficient number, since it is larger than the sum of its proper divisors (270514105403).

811542316197 is a wasteful number, since it uses less digits than its factorization.

811542316197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270514105402.

The product of its digits is 362880, while the sum is 48.

The spelling of 811542316197 in words is "eight hundred eleven billion, five hundred forty-two million, three hundred sixteen thousand, one hundred ninety-seven".