855563333461 has 4 divisors (see below), whose sum is σ = 858483345132. Its totient is φ = 852643321792.

The previous prime is 855563333459. The next prime is 855563333467. The reversal of 855563333461 is 164333365558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164333365558 = 2 ⋅82166682779.

It can be written as a sum of positive squares in 2 ways, for example, as 837682562500 + 17880770961 = 915250^2 + 133719^2 .

It is a cyclic number.

It is not a de Polignac number, because 855563333461 - 2¹ = 855563333459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 855563333399 and 855563333408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855563333467) 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, 1460005396 + ... + 1460005981.

It is an arithmetic number, because the mean of its divisors is an integer number (214620836283).

Almost surely, 2^855563333461 is an apocalyptic number.

It is an amenable number.

855563333461 is a deficient number, since it is larger than the sum of its proper divisors (2920011671).

855563333461 is a wasteful number, since it uses less digits than its factorization.

855563333461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920011670.

The product of its digits is 11664000, while the sum is 52.

The spelling of 855563333461 in words is "eight hundred fifty-five billion, five hundred sixty-three million, three hundred thirty-three thousand, four hundred sixty-one".