4821780257 has 4 divisors (see below), whose sum is σ = 5510606016. Its totient is φ = 4132954500.

The previous prime is 4821780241. The next prime is 4821780281. The reversal of 4821780257 is 7520871284.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4821780257 - 2⁴ = 4821780241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4821785257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344412869 + ... + 344412882.

It is an arithmetic number, because the mean of its divisors is an integer number (1377651504).

Almost surely, 2^4821780257 is an apocalyptic number.

It is an amenable number.

4821780257 is a deficient number, since it is larger than the sum of its proper divisors (688825759).

4821780257 is an equidigital number, since it uses as much as digits as its factorization.

4821780257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688825758.

The product of its (nonzero) digits is 250880, while the sum is 44.

The square root of 4821780257 is about 69439.0398623138. The cubic root of 4821780257 is about 1689.4128951616.

The spelling of 4821780257 in words is "four billion, eight hundred twenty-one million, seven hundred eighty thousand, two hundred fifty-seven".