254840203489 has 3 divisors (see below), whose sum is σ = 254840708307. Its totient is φ = 254839698672.

The previous prime is 254840203487. The next prime is 254840203493. The reversal of 254840203489 is 984302048452.

The square root of 254840203489 is 504817.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 15531390625 + 239308812864 = 124625^2 + 489192^2 .

It is not a de Polignac number, because 254840203489 - 2¹ = 254840203487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254840203487) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 252409 + ... + 757225.

It is an arithmetic number, because the mean of its divisors is an integer number (84946902769).

Almost surely, 2^254840203489 is an apocalyptic number.

254840203489 is the 504817-th square number.

254840203489 is the 252409-th centered octagonal number.

It is an amenable number.

254840203489 is a deficient number, since it is larger than the sum of its proper divisors (504818).

254840203489 is an frugal number, since it uses more digits than its factorization.

254840203489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009634 (or 504817 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 49.

Multiplying 254840203489 by its sum of digits (49), we get a square (12487169970961 = 3533719²).

It can be divided in two parts, 254840 and 203489, that added together give a square (458329 = 677²).

The spelling of 254840203489 in words is "two hundred fifty-four billion, eight hundred forty million, two hundred three thousand, four hundred eighty-nine".