855220623 has 16 divisors (see below), whose sum is σ = 1160083200. Its totient is φ = 560309184.

The previous prime is 855220621. The next prime is 855220633. The reversal of 855220623 is 326022558.

It is not a de Polignac number, because 855220623 - 2¹ = 855220621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855220621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55078 + ... + 68876.

It is an arithmetic number, because the mean of its divisors is an integer number (72505200).

Almost surely, 2^855220623 is an apocalyptic number.

855220623 is a deficient number, since it is larger than the sum of its proper divisors (304862577).

855220623 is a wasteful number, since it uses less digits than its factorization.

855220623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14158.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 855220623 is about 29244.1553647904. The cubic root of 855220623 is about 949.2036254847.

The spelling of 855220623 in words is "eight hundred fifty-five million, two hundred twenty thousand, six hundred twenty-three".