2578245867 has 6 divisors (see below), whose sum is σ = 3724132932. Its totient is φ = 1718830572.

The previous prime is 2578245863. The next prime is 2578245883. The reversal of 2578245867 is 7685428752.

2578245867 is a `hidden beast` number, since 2 + 57 + 8 + 2 + 4 + 586 + 7 = 666.

It is not a de Polignac number, because 2578245867 - 2² = 2578245863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578245863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143235873 + ... + 143235890.

It is an arithmetic number, because the mean of its divisors is an integer number (620688822).

Almost surely, 2^2578245867 is an apocalyptic number.

2578245867 is a deficient number, since it is larger than the sum of its proper divisors (1145887065).

2578245867 is a wasteful number, since it uses less digits than its factorization.

2578245867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286471769 (or 286471766 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The square root of 2578245867 is about 50776.4302309644. The cubic root of 2578245867 is about 1371.2230658820.

The spelling of 2578245867 in words is "two billion, five hundred seventy-eight million, two hundred forty-five thousand, eight hundred sixty-seven".