812780808850 has 12 divisors (see below), whose sum is σ = 1511772304554. Its totient is φ = 325112323520.

The previous prime is 812780808809. The next prime is 812780808863. The reversal of 812780808850 is 58808087218.

It can be written as a sum of positive squares in 3 ways, for example, as 617187785769 + 195593023081 = 785613^2 + 442259^2 .

It is a super-2 number, since 2×812780808850² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 812780808791 and 812780808800.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8127808039 + ... + 8127808138.

Almost surely, 2^812780808850 is an apocalyptic number.

812780808850 is a deficient number, since it is larger than the sum of its proper divisors (698991495704).

812780808850 is a wasteful number, since it uses less digits than its factorization.

812780808850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16255616189 (or 16255616184 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 55.

The spelling of 812780808850 in words is "eight hundred twelve billion, seven hundred eighty million, eight hundred eight thousand, eight hundred fifty".