2009905457 has 8 divisors (see below), whose sum is σ = 2298464832. Its totient is φ = 1721703600.

The previous prime is 2009905421. The next prime is 2009905459. The reversal of 2009905457 is 7545099002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2009905457 - 2¹⁶ = 2009839921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009905459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77219 + ... + 99912.

It is an arithmetic number, because the mean of its divisors is an integer number (287308104).

Almost surely, 2^2009905457 is an apocalyptic number.

It is an amenable number.

2009905457 is a deficient number, since it is larger than the sum of its proper divisors (288559375).

2009905457 is a wasteful number, since it uses less digits than its factorization.

2009905457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178759.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 2009905457 is about 44831.9691403356. The cubic root of 2009905457 is about 1261.9976410252.

The spelling of 2009905457 in words is "two billion, nine million, nine hundred five thousand, four hundred fifty-seven".