811862269156 has 27 divisors (see below), whose sum is σ = 1509306101947. Its totient is φ = 382038416000.

The previous prime is 811862269151. The next prime is 811862269157. The reversal of 811862269156 is 651962268118.

The square root of 811862269156 is 901034.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 15156072100 + 796706197056 = 123110^2 + 892584^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811862269097 and 811862269106.

It is not an unprimeable number, because it can be changed into a prime (811862269151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30621906 + ... + 30648406.

Almost surely, 2^811862269156 is an apocalyptic number.

811862269156 is the 901034-th square number.

It is an amenable number.

811862269156 is a deficient number, since it is larger than the sum of its proper divisors (697443832791).

811862269156 is an frugal number, since it uses more digits than its factorization.

811862269156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53040 (or 26520 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 55.

The spelling of 811862269156 in words is "eight hundred eleven billion, eight hundred sixty-two million, two hundred sixty-nine thousand, one hundred fifty-six".