2578617964 has 48 divisors (see below), whose sum is σ = 5007558528. Its totient is φ = 1154377728.

The previous prime is 2578617947. The next prime is 2578617967. The reversal of 2578617964 is 4697168752.

2578617964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2578617967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271504 + ... + 280840.

It is an arithmetic number, because the mean of its divisors is an integer number (104324136).

Almost surely, 2^2578617964 is an apocalyptic number.

It is an amenable number.

2578617964 is a deficient number, since it is larger than the sum of its proper divisors (2428940564).

2578617964 is a wasteful number, since it uses less digits than its factorization.

2578617964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514 (or 9512 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The square root of 2578617964 is about 50780.0941708461. The cubic root of 2578617964 is about 1371.2890284876.

The spelling of 2578617964 in words is "two billion, five hundred seventy-eight million, six hundred seventeen thousand, nine hundred sixty-four".