2558646285478 has 4 divisors (see below), whose sum is σ = 3837969428220. Its totient is φ = 1279323142738.

The previous prime is 2558646285473. The next prime is 2558646285491. The reversal of 2558646285478 is 8745826468552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558646285473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639661571368 + ... + 639661571371.

It is an arithmetic number, because the mean of its divisors is an integer number (959492357055).

Almost surely, 2^{2558646285478} is an apocalyptic number.

2558646285478 is a deficient number, since it is larger than the sum of its proper divisors (1279323142742).

2558646285478 is a wasteful number, since it uses less digits than its factorization.

2558646285478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279323142741.

The product of its digits is 1032192000, while the sum is 70.

The spelling of 2558646285478 in words is "two trillion, five hundred fifty-eight billion, six hundred forty-six million, two hundred eighty-five thousand, four hundred seventy-eight".