855308661101 has 4 divisors (see below), whose sum is σ = 882899263104. Its totient is φ = 827718059100.

The previous prime is 855308661089. The next prime is 855308661157. The reversal of 855308661101 is 101166803558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855308661101 - 2³⁰ = 854234919277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855308361101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13795300955 + ... + 13795301016.

It is an arithmetic number, because the mean of its divisors is an integer number (220724815776).

Almost surely, 2^855308661101 is an apocalyptic number.

It is an amenable number.

855308661101 is a deficient number, since it is larger than the sum of its proper divisors (27590602003).

855308661101 is a wasteful number, since it uses less digits than its factorization.

855308661101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27590602002.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 855308661101 in words is "eight hundred fifty-five billion, three hundred eight million, six hundred sixty-one thousand, one hundred one".