810199915776 has 252 divisors, whose sum is σ = 2428422258528. Its totient is φ = 269656998912.

The previous prime is 810199915771. The next prime is 810199915781. The reversal of 810199915776 is 677519991018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (810199915771) and next prime (810199915781).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810199915771) 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 27 ways as a sum of consecutive naturals, for example, 138658711 + ... + 138664553.

It is an arithmetic number, because the mean of its divisors is an integer number (9636596264).

Almost surely, 2^810199915776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810199915776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214211129264).

810199915776 is an abundant number, since it is smaller than the sum of its proper divisors (1618222342752).

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

810199915776 is an frugal number, since it uses more digits than its factorization.

810199915776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620 (or 6591 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 63.

The spelling of 810199915776 in words is "eight hundred ten billion, one hundred ninety-nine million, nine hundred fifteen thousand, seven hundred seventy-six".