4945257209 has 8 divisors (see below), whose sum is σ = 5187290112. Its totient is φ = 4705476160.

The previous prime is 4945257193. The next prime is 4945257227. The reversal of 4945257209 is 9027525494.

It is a happy number.

4945257209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 4945257209 - 2⁴ = 4945257193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4945257259) 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, 558464 + ... + 567249.

It is an arithmetic number, because the mean of its divisors is an integer number (648411264).

Almost surely, 2^4945257209 is an apocalyptic number.

It is an amenable number.

4945257209 is a deficient number, since it is larger than the sum of its proper divisors (242032903).

4945257209 is a wasteful number, since it uses less digits than its factorization.

4945257209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125927.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 4945257209 is about 70322.5227718688. The cubic root of 4945257209 is about 1703.7124415801.

The spelling of 4945257209 in words is "four billion, nine hundred forty-five million, two hundred fifty-seven thousand, two hundred nine".