811496874613 has 4 divisors (see below), whose sum is σ = 811764081100. Its totient is φ = 811229668128.

The previous prime is 811496874611. The next prime is 811496874649. The reversal of 811496874613 is 316478694118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316478694118 = 2 ⋅158239347059.

It can be written as a sum of positive squares in 2 ways, for example, as 764563118449 + 46933756164 = 874393^2 + 216642^2 .

It is a cyclic number.

It is not a de Polignac number, because 811496874613 - 2¹ = 811496874611 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 (811496874611) 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, 133598688 + ... + 133604761.

It is an arithmetic number, because the mean of its divisors is an integer number (202941020275).

Almost surely, 2^811496874613 is an apocalyptic number.

It is an amenable number.

811496874613 is a deficient number, since it is larger than the sum of its proper divisors (267206487).

811496874613 is a wasteful number, since it uses less digits than its factorization.

811496874613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267206486.

The product of its digits is 6967296, while the sum is 58.

The spelling of 811496874613 in words is "eight hundred eleven billion, four hundred ninety-six million, eight hundred seventy-four thousand, six hundred thirteen".