811300195780 has 48 divisors (see below), whose sum is σ = 1762878705840. Its totient is φ = 313258803200.

The previous prime is 811300195763. The next prime is 811300195799. The reversal of 811300195780 is 87591003118.

It can be written as a sum of positive squares in 8 ways, for example, as 115383861124 + 695916334656 = 339682^2 + 834216^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2442900 + ... + 2755060.

It is an arithmetic number, because the mean of its divisors is an integer number (36726639705).

Almost surely, 2^811300195780 is an apocalyptic number.

It is an amenable number.

811300195780 is an abundant number, since it is smaller than the sum of its proper divisors (951578510060).

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

811300195780 is a wasteful number, since it uses less digits than its factorization.

811300195780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316680 (or 316678 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 43.

Adding to 811300195780 its reverse (87591003118), we get a palindrome (898891198898).

The spelling of 811300195780 in words is "eight hundred eleven billion, three hundred million, one hundred ninety-five thousand, seven hundred eighty".