820856846883601 has 8 divisors (see below), whose sum is σ = 895525696567008. Its totient is φ = 746195580528000.

The previous prime is 820856846883559. The next prime is 820856846883631. The reversal of 820856846883601 is 106388648658028.

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

It is a cyclic number.

It is not a de Polignac number, because 820856846883601 - 2⁹ = 820856846883089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820856846883631) 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, 1895605615 + ... + 1896038596.

It is an arithmetic number, because the mean of its divisors is an integer number (111940712070876).

Almost surely, 2^{820856846883601} is an apocalyptic number.

It is an amenable number.

820856846883601 is a deficient number, since it is larger than the sum of its proper divisors (74668849683407).

820856846883601 is a wasteful number, since it uses less digits than its factorization.

820856846883601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791663903.

The product of its (nonzero) digits is 849346560, while the sum is 73.

The spelling of 820856846883601 in words is "eight hundred twenty trillion, eight hundred fifty-six billion, eight hundred forty-six million, eight hundred eighty-three thousand, six hundred one".