4891906855 has 12 divisors (see below), whose sum is σ = 6404629896. Its totient is φ = 3557373200.

The previous prime is 4891906853. The next prime is 4891906867. The reversal of 4891906855 is 5586091984.

It is not a de Polignac number, because 4891906855 - 2¹ = 4891906853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4891906796 and 4891906805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891906853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513990 + ... + 523420.

It is an arithmetic number, because the mean of its divisors is an integer number (533719158).

Almost surely, 2^4891906855 is an apocalyptic number.

4891906855 is a deficient number, since it is larger than the sum of its proper divisors (1512723041).

4891906855 is an frugal number, since it uses more digits than its factorization.

4891906855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18878 (or 9447 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 4891906855 is about 69942.1679317992. The cubic root of 4891906855 is about 1697.5636212412.

Multiplying 4891906855 by its sum of digits (55), we get a square (269054877025 = 518705²).

4891906855 divided by its sum of digits (55) gives a square (88943761 = 9431²).

The spelling of 4891906855 in words is "four billion, eight hundred ninety-one million, nine hundred six thousand, eight hundred fifty-five".