820058049661 has 16 divisors (see below), whose sum is σ = 843838481920. Its totient is φ = 796694065200.

The previous prime is 820058049647. The next prime is 820058049667. The reversal of 820058049661 is 166940850028.

It is a cyclic number.

It is not a de Polignac number, because 820058049661 - 2¹⁹ = 820057525373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820058049667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114690 + ... + 1697836.

It is an arithmetic number, because the mean of its divisors is an integer number (52739905120).

Almost surely, 2^820058049661 is an apocalyptic number.

It is an amenable number.

820058049661 is a deficient number, since it is larger than the sum of its proper divisors (23780432259).

820058049661 is a wasteful number, since it uses less digits than its factorization.

820058049661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583504.

The product of its (nonzero) digits is 829440, while the sum is 49.

Adding to 820058049661 its reverse (166940850028), we get a palindrome (986998899689).

The spelling of 820058049661 in words is "eight hundred twenty billion, fifty-eight million, forty-nine thousand, six hundred sixty-one".