618822871822821 has 8 divisors (see below), whose sum is σ = 831033113239840. Its totient is φ = 409580605810512.

The previous prime is 618822871822811. The next prime is 618822871822823. The reversal of 618822871822821 is 128228178228816.

618822871822821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 618822871822821 - 2³¹ = 618820724339173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618822871822823) 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, 741993850690 + ... + 741993851523.

It is an arithmetic number, because the mean of its divisors is an integer number (103879139154980).

Almost surely, 2^{618822871822821} is an apocalyptic number.

It is an amenable number.

618822871822821 is a deficient number, since it is larger than the sum of its proper divisors (212210241417019).

618822871822821 is a wasteful number, since it uses less digits than its factorization.

618822871822821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483987702355.

The product of its digits is 44040192, while the sum is 66.

The spelling of 618822871822821 in words is "six hundred eighteen trillion, eight hundred twenty-two billion, eight hundred seventy-one million, eight hundred twenty-two thousand, eight hundred twenty-one".