855579417797 has 8 divisors (see below), whose sum is σ = 921402749400. Its totient is φ = 789757447680.

The previous prime is 855579417773. The next prime is 855579417821. The reversal of 855579417797 is 797714975558.

It is an interprime number because it is at equal distance from previous prime (855579417773) and next prime (855579417821).

It can be written as a sum of positive squares in 4 ways, for example, as 113915700196 + 741663717601 = 337514^2 + 861199^2 .

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 855579417797 - 2³² = 851284450501 is a prime.

It is a super-2 number, since 2×855579417797² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855579417097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1234829 + ... + 1798877.

It is an arithmetic number, because the mean of its divisors is an integer number (115175343675).

Almost surely, 2^855579417797 is an apocalyptic number.

It is an amenable number.

855579417797 is a deficient number, since it is larger than the sum of its proper divisors (65823331603).

855579417797 is a wasteful number, since it uses less digits than its factorization.

855579417797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680743.

The product of its digits is 777924000, while the sum is 74.

The spelling of 855579417797 in words is "eight hundred fifty-five billion, five hundred seventy-nine million, four hundred seventeen thousand, seven hundred ninety-seven".