2581344405 has 48 divisors (see below), whose sum is σ = 4650871680. Its totient is φ = 1323298944.

The previous prime is 2581344343. The next prime is 2581344439. The reversal of 2581344405 is 5044431852.

It is a happy number.

2581344405 is a `hidden beast` number, since 2 + 581 + 34 + 4 + 40 + 5 = 666.

It is not a de Polignac number, because 2581344405 - 2¹⁴ = 2581328021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2581344405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128856 + ... + 147534.

It is an arithmetic number, because the mean of its divisors is an integer number (96893160).

Almost surely, 2^2581344405 is an apocalyptic number.

It is an amenable number.

2581344405 is a deficient number, since it is larger than the sum of its proper divisors (2069527275).

2581344405 is a wasteful number, since it uses less digits than its factorization.

2581344405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18810 (or 18807 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 2581344405 is about 50806.9326470315. The cubic root of 2581344405 is about 1371.7721583097.

The spelling of 2581344405 in words is "two billion, five hundred eighty-one million, three hundred forty-four thousand, four hundred five".