816895230780 has 24 divisors (see below), whose sum is σ = 2287306646352. Its totient is φ = 217838728192.

The previous prime is 816895230773. The next prime is 816895230787. The reversal of 816895230780 is 87032598618.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (816895230773) and next prime (816895230787).

It is a super-2 number, since 2×816895230780² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816895230780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816895230787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6807460197 + ... + 6807460316.

It is an arithmetic number, because the mean of its divisors is an integer number (95304443598).

Almost surely, 2^816895230780 is an apocalyptic number.

It is an amenable number.

816895230780 is an abundant number, since it is smaller than the sum of its proper divisors (1470411415572).

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

816895230780 is a wasteful number, since it uses less digits than its factorization.

816895230780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614920525 (or 13614920523 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 816895230780 in words is "eight hundred sixteen billion, eight hundred ninety-five million, two hundred thirty thousand, seven hundred eighty".