820456750384130 has 8 divisors (see below), whose sum is σ = 1476822150691452. Its totient is φ = 328182700153648.

The previous prime is 820456750384123. The next prime is 820456750384169. The reversal of 820456750384130 is 31483057654028.

It can be written as a sum of positive squares in 2 ways, for example, as 815185239999601 + 5271510384529 = 28551449^2 + 2295977^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41022837519197 + ... + 41022837519216.

Almost surely, 2^{820456750384130} is an apocalyptic number.

820456750384130 is a deficient number, since it is larger than the sum of its proper divisors (656365400307322).

820456750384130 is a wasteful number, since it uses less digits than its factorization.

820456750384130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82045675038420.

The product of its (nonzero) digits is 19353600, while the sum is 56.

The spelling of 820456750384130 in words is "eight hundred twenty trillion, four hundred fifty-six billion, seven hundred fifty million, three hundred eighty-four thousand, one hundred thirty".