812649651103 has 4 divisors (see below), whose sum is σ = 813164313640. Its totient is φ = 812134988568.

The previous prime is 812649651083. The next prime is 812649651109. The reversal of 812649651103 is 301156946218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301156946218 = 2 ⋅150578473109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812649651103 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 (812649651109) 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, 257328900 + ... + 257332057.

It is an arithmetic number, because the mean of its divisors is an integer number (203291078410).

Almost surely, 2^812649651103 is an apocalyptic number.

812649651103 is a deficient number, since it is larger than the sum of its proper divisors (514662537).

812649651103 is a wasteful number, since it uses less digits than its factorization.

812649651103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514662536.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 812649651103 in words is "eight hundred twelve billion, six hundred forty-nine million, six hundred fifty-one thousand, one hundred three".