2578245863 has 2 divisors, whose sum is σ = 2578245864. Its totient is φ = 2578245862.

The previous prime is 2578245847. The next prime is 2578245883. The reversal of 2578245863 is 3685428752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2578245863 - 2⁴ = 2578245847 is a prime.

It is a super-2 number, since 2×2578245863² = 13294703460153229538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2578245883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289122931 + 1289122932.

It is an arithmetic number, because the mean of its divisors is an integer number (1289122932).

Almost surely, 2^2578245863 is an apocalyptic number.

2578245863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578245863 is an equidigital number, since it uses as much as digits as its factorization.

2578245863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 50.

The square root of 2578245863 is about 50776.4301915761. The cubic root of 2578245863 is about 1371.2230651729.

The spelling of 2578245863 in words is "two billion, five hundred seventy-eight million, two hundred forty-five thousand, eight hundred sixty-three".