2578431466 has 16 divisors (see below), whose sum is σ = 4172502600. Its totient is φ = 1187947008.

The previous prime is 2578431439. The next prime is 2578431521. The reversal of 2578431466 is 6641348752.

It can be written as a sum of positive squares in 4 ways, for example, as 2136380841 + 442050625 = 46221^2 + 21025^2 .

It is a super-4 number, since 4×2578431466⁴ (a number of 39 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72351 + ... + 101938.

Almost surely, 2^2578431466 is an apocalyptic number.

2578431466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2578431466 is a deficient number, since it is larger than the sum of its proper divisors (1594071134).

2578431466 is a wasteful number, since it uses less digits than its factorization.

2578431466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174873.

The product of its digits is 967680, while the sum is 46.

The square root of 2578431466 is about 50778.2578078453. The cubic root of 2578431466 is about 1371.2559682940.

The spelling of 2578431466 in words is "two billion, five hundred seventy-eight million, four hundred thirty-one thousand, four hundred sixty-six".