2559664315478 has 4 divisors (see below), whose sum is σ = 3839496473220. Its totient is φ = 1279832157738.

The previous prime is 2559664315441. The next prime is 2559664315493. The reversal of 2559664315478 is 8745134669552.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×2559664315478³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639916078868 + ... + 639916078871.

It is an arithmetic number, because the mean of its divisors is an integer number (959874118305).

Almost surely, 2^{2559664315478} is an apocalyptic number.

2559664315478 is a deficient number, since it is larger than the sum of its proper divisors (1279832157742).

2559664315478 is a wasteful number, since it uses less digits than its factorization.

2559664315478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279832157741.

The product of its digits is 217728000, while the sum is 65.

The spelling of 2559664315478 in words is "two trillion, five hundred fifty-nine billion, six hundred sixty-four million, three hundred fifteen thousand, four hundred seventy-eight".