2578144065 has 64 divisors (see below), whose sum is σ = 4872192000. Its totient is φ = 1163477952.

The previous prime is 2578144057. The next prime is 2578144123. The reversal of 2578144065 is 5604418752.

It is a happy number.

2578144065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2578144065 - 2³ = 2578144057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 403284 + ... + 409626.

It is an arithmetic number, because the mean of its divisors is an integer number (76128000).

Almost surely, 2^2578144065 is an apocalyptic number.

It is an amenable number.

2578144065 is a deficient number, since it is larger than the sum of its proper divisors (2294047935).

2578144065 is an equidigital number, since it uses as much as digits as its factorization.

2578144065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451 (or 6437 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 2578144065 is about 50775.4277677697. The cubic root of 2578144065 is about 1371.2050180703.

The spelling of 2578144065 in words is "two billion, five hundred seventy-eight million, one hundred forty-four thousand, sixty-five".