2578039245 has 70 divisors (see below), whose sum is σ = 4804003878. Its totient is φ = 1327542048.

The previous prime is 2578039231. The next prime is 2578039309. The reversal of 2578039245 is 5429308752.

2578039245 is a `hidden beast` number, since 2 + 578 + 0 + 39 + 2 + 45 = 666.

2578039245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 418857156 + 2159182089 = 20466^2 + 46467^2 .

It is not a de Polignac number, because 2578039245 - 2²² = 2573844941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2578039245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 88897891 + ... + 88897919.

Almost surely, 2^2578039245 is an apocalyptic number.

It is an amenable number.

2578039245 is a deficient number, since it is larger than the sum of its proper divisors (2225964633).

2578039245 is an frugal number, since it uses more digits than its factorization.

2578039245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 2578039245 is about 50774.3955650877. The cubic root of 2578039245 is about 1371.1864347206.

Multiplying 2578039245 by its sum of digits (45), we get a square (116011766025 = 340605²).

2578039245 divided by its sum of digits (45) gives a 4-th power (57289761 = 87⁴).

It can be divided in two parts, 25780 and 39245, that added together give a square (65025 = 255²).

The spelling of 2578039245 in words is "two billion, five hundred seventy-eight million, thirty-nine thousand, two hundred forty-five".