2578248257 has 8 divisors (see below), whose sum is σ = 2823636480. Its totient is φ = 2339583120.

The previous prime is 2578248251. The next prime is 2578248287. The reversal of 2578248257 is 7528428752.

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 2578248257 - 2⁶ = 2578248193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578248251) 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, 1679969 + ... + 1681502.

It is an arithmetic number, because the mean of its divisors is an integer number (352954560).

Almost surely, 2^2578248257 is an apocalyptic number.

It is an amenable number.

2578248257 is a deficient number, since it is larger than the sum of its proper divisors (245388223).

2578248257 is a wasteful number, since it uses less digits than its factorization.

2578248257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361543.

The product of its digits is 2508800, while the sum is 50.

The square root of 2578248257 is about 50776.4537655004. The cubic root of 2578248257 is about 1371.2234895838.

The spelling of 2578248257 in words is "two billion, five hundred seventy-eight million, two hundred forty-eight thousand, two hundred fifty-seven".