820831359801 has 4 divisors (see below), whose sum is σ = 1094441813072. Its totient is φ = 547220906532.

The previous prime is 820831359779. The next prime is 820831359847. The reversal of 820831359801 is 108953138028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 820831359801 - 2⁵ = 820831359769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (820831359851) 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 3 ways as a sum of consecutive naturals, for example, 136805226631 + ... + 136805226636.

It is an arithmetic number, because the mean of its divisors is an integer number (273610453268).

Almost surely, 2^820831359801 is an apocalyptic number.

It is an amenable number.

820831359801 is a deficient number, since it is larger than the sum of its proper divisors (273610453271).

820831359801 is a wasteful number, since it uses less digits than its factorization.

820831359801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273610453270.

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 820831359801 in words is "eight hundred twenty billion, eight hundred thirty-one million, three hundred fifty-nine thousand, eight hundred one".