855598820617 has 8 divisors (see below), whose sum is σ = 874997731872. Its totient is φ = 836394873600.

The previous prime is 855598820611. The next prime is 855598820633. The reversal of 855598820617 is 716028895558.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855598820617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855598820611) 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, 48732184 + ... + 48749737.

It is an arithmetic number, because the mean of its divisors is an integer number (109374716484).

Almost surely, 2^855598820617 is an apocalyptic number.

It is an amenable number.

855598820617 is a deficient number, since it is larger than the sum of its proper divisors (19398911255).

855598820617 is a wasteful number, since it uses less digits than its factorization.

855598820617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97482119.

The product of its (nonzero) digits is 48384000, while the sum is 64.

The spelling of 855598820617 in words is "eight hundred fifty-five billion, five hundred ninety-eight million, eight hundred twenty thousand, six hundred seventeen".