819700512820 has 48 divisors (see below), whose sum is σ = 1968021982080. Its totient is φ = 280934354304.

The previous prime is 819700512817. The next prime is 819700512823. The reversal of 819700512820 is 28215007918.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (819700512817) and next prime (819700512823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819700512823) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 728719 + ... + 1473238.

It is an arithmetic number, because the mean of its divisors is an integer number (41000457960).

Almost surely, 2^819700512820 is an apocalyptic number.

It is an amenable number.

819700512820 is an abundant number, since it is smaller than the sum of its proper divisors (1148321469260).

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

819700512820 is a wasteful number, since it uses less digits than its factorization.

819700512820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204632 (or 2204630 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The spelling of 819700512820 in words is "eight hundred nineteen billion, seven hundred million, five hundred twelve thousand, eight hundred twenty".