641774289 has 12 divisors (see below), whose sum is σ = 926586096. Its totient is φ = 394937712.

The previous prime is 641774281. The next prime is 641774291. The reversal of 641774289 is 982477146.

It is not a de Polignac number, because 641774289 - 2³ = 641774281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641774281) 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, 632407 + ... + 633420.

It is an arithmetic number, because the mean of its divisors is an integer number (77215508).

Almost surely, 2^641774289 is an apocalyptic number.

It is an amenable number.

641774289 is a deficient number, since it is larger than the sum of its proper divisors (284811807).

641774289 is a wasteful number, since it uses less digits than its factorization.

641774289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265856 (or 1265843 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 641774289 is about 25333.2644757836. The cubic root of 641774289 is about 862.5695140780.

The spelling of 641774289 in words is "six hundred forty-one million, seven hundred seventy-four thousand, two hundred eighty-nine".