812275920810 has 48 divisors (see below), whose sum is σ = 2151764904744. Its totient is φ = 212519988096.

The previous prime is 812275920787. The next prime is 812275920887. The reversal of 812275920810 is 18029572218.

It can be written as a sum of positive squares in 4 ways, for example, as 673599374361 + 138676546449 = 820731^2 + 372393^2 .

It is a super-2 number, since 2×812275920810² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85139457 + ... + 85148996.

Almost surely, 2^812275920810 is an apocalyptic number.

812275920810 is an abundant number, since it is smaller than the sum of its proper divisors (1339488983934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812275920810 is a wasteful number, since it uses less digits than its factorization.

812275920810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170288519 (or 170288516 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 812275920810 in words is "eight hundred twelve billion, two hundred seventy-five million, nine hundred twenty thousand, eight hundred ten".