810229885172 has 24 divisors (see below), whose sum is σ = 1449870639336. Its totient is φ = 396036321408.

The previous prime is 810229885159. The next prime is 810229885183. The reversal of 810229885172 is 271588922018.

It can be written as a sum of positive squares in 4 ways, for example, as 6488946916 + 803740938256 = 80554^2 + 896516^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6839903 + ... + 6957350.

It is an arithmetic number, because the mean of its divisors is an integer number (60411276639).

Almost surely, 2^810229885172 is an apocalyptic number.

It is an amenable number.

810229885172 is a deficient number, since it is larger than the sum of its proper divisors (639640754164).

810229885172 is a wasteful number, since it uses less digits than its factorization.

810229885172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13797587 (or 13797585 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 810229885172 in words is "eight hundred ten billion, two hundred twenty-nine million, eight hundred eighty-five thousand, one hundred seventy-two".