2578305805500 has 96 divisors (see below), whose sum is σ = 7534746692928. Its totient is φ = 685101312000.

The previous prime is 2578305805429. The next prime is 2578305805531. The reversal of 2578305805500 is 55085038752.

It is a self number, because there is not a number n which added to its sum of digits gives 2578305805500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2636989 + ... + 3479988.

It is an arithmetic number, because the mean of its divisors is an integer number (78486944718).

Almost surely, 2^{2578305805500} is an apocalyptic number.

2578305805500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578305805500 is an abundant number, since it is smaller than the sum of its proper divisors (4956440887428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2578305805500 is a wasteful number, since it uses less digits than its factorization.

2578305805500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117280 (or 6117268 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 2578305805500 in words is "two trillion, five hundred seventy-eight billion, three hundred five million, eight hundred five thousand, five hundred".