854151185209 has 27 divisors (see below), whose sum is σ = 1026931243941. Its totient is φ = 708346147320.

The previous prime is 854151185207. The next prime is 854151185297. The reversal of 854151185209 is 902581151458.

The square root of 854151185209 is 924203.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 854151185209 - 2¹ = 854151185207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854151185207) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 200549922 + ... + 200554180.

Almost surely, 2^854151185209 is an apocalyptic number.

854151185209 is the 924203-rd square number.

854151185209 is the 462102-nd centered octagonal number.

It is an amenable number.

854151185209 is a deficient number, since it is larger than the sum of its proper divisors (172780058732).

854151185209 is an frugal number, since it uses more digits than its factorization.

854151185209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8594 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 49.

Multiplying 854151185209 by its sum of digits (49), we get a square (41853408075241 = 6469421²).

854151185209 divided by its sum of digits (49) gives a square (17431656841 = 132029²).

The spelling of 854151185209 in words is "eight hundred fifty-four billion, one hundred fifty-one million, one hundred eighty-five thousand, two hundred nine".