820352031646 has 16 divisors (see below), whose sum is σ = 1406977752960. Its totient is φ = 351414446040.

The previous prime is 820352031641. The next prime is 820352031677. The reversal of 820352031646 is 646130253028.

It is a super-3 number, since 3×820352031646³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 820352031599 and 820352031608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820352031641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13718776 + ... + 13778443.

It is an arithmetic number, because the mean of its divisors is an integer number (87936109560).

Almost surely, 2^820352031646 is an apocalyptic number.

820352031646 is a deficient number, since it is larger than the sum of its proper divisors (586625721314).

820352031646 is a wasteful number, since it uses less digits than its factorization.

820352031646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27499359.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 820352031646 in words is "eight hundred twenty billion, three hundred fifty-two million, thirty-one thousand, six hundred forty-six".