2578781875 has 10 divisors (see below), whose sum is σ = 3222446612. Its totient is φ = 2063025000.

The previous prime is 2578781869. The next prime is 2578781899. The reversal of 2578781875 is 5781878752.

It is not a de Polignac number, because 2578781875 - 2³¹ = 431298227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2062401 + ... + 2063650.

Almost surely, 2^2578781875 is an apocalyptic number.

2578781875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2578781875 is a deficient number, since it is larger than the sum of its proper divisors (643664737).

2578781875 is an frugal number, since it uses more digits than its factorization.

2578781875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126071 (or 4126056 counting only the distinct ones).

The product of its digits is 8780800, while the sum is 58.

The square root of 2578781875 is about 50781.7080748570. The cubic root of 2578781875 is about 1371.3180834047.

The spelling of 2578781875 in words is "two billion, five hundred seventy-eight million, seven hundred eighty-one thousand, eight hundred seventy-five".