855955868101 has 4 divisors (see below), whose sum is σ = 857812605804. Its totient is φ = 854099130400.

The previous prime is 855955868099. The next prime is 855955868143. The reversal of 855955868101 is 101868559558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108204813025 + 747751055076 = 328945^2 + 864726^2 .

It is a cyclic number.

It is not a de Polignac number, because 855955868101 - 2¹ = 855955868099 is a prime.

It is a super-3 number, since 3×855955868101³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855955868101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855955868401) 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 3 ways as a sum of consecutive naturals, for example, 928368160 + ... + 928369081.

It is an arithmetic number, because the mean of its divisors is an integer number (214453151451).

Almost surely, 2^855955868101 is an apocalyptic number.

It is an amenable number.

855955868101 is a deficient number, since it is larger than the sum of its proper divisors (1856737703).

855955868101 is a wasteful number, since it uses less digits than its factorization.

855955868101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856737702.

The product of its (nonzero) digits is 17280000, while the sum is 61.

The spelling of 855955868101 in words is "eight hundred fifty-five billion, nine hundred fifty-five million, eight hundred sixty-eight thousand, one hundred one".