2578265385 has 16 divisors (see below), whose sum is σ = 4304582784. Its totient is φ = 1315288832.

The previous prime is 2578265341. The next prime is 2578265411. The reversal of 2578265385 is 5835628752.

2578265385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2578265385 - 2⁶ = 2578265321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3736272 + ... + 3736961.

It is an arithmetic number, because the mean of its divisors is an integer number (269036424).

Almost surely, 2^2578265385 is an apocalyptic number.

It is an amenable number.

2578265385 is a deficient number, since it is larger than the sum of its proper divisors (1726317399).

2578265385 is a wasteful number, since it uses less digits than its factorization.

2578265385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473264.

The product of its digits is 4032000, while the sum is 51.

The square root of 2578265385 is about 50776.6224260732. The cubic root of 2578265385 is about 1371.2265260465.

The spelling of 2578265385 in words is "two billion, five hundred seventy-eight million, two hundred sixty-five thousand, three hundred eighty-five".