2581404369 has 8 divisors (see below), whose sum is σ = 3442589952. Its totient is φ = 1720577520.

The previous prime is 2581404349. The next prime is 2581404373. The reversal of 2581404369 is 9634041852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2581404369 - 2¹³ = 2581396177 is a prime.

It is a super-2 number, since 2×2581404369² = 13327297032584576322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2581404369.

It is not an unprimeable number, because it can be changed into a prime (2581404349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72417 + ... + 102014.

It is an arithmetic number, because the mean of its divisors is an integer number (430323744).

Almost surely, 2^2581404369 is an apocalyptic number.

It is an amenable number.

2581404369 is a deficient number, since it is larger than the sum of its proper divisors (861185583).

2581404369 is a wasteful number, since it uses less digits than its factorization.

2581404369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179367.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 2581404369 is about 50807.5227599221. The cubic root of 2581404369 is about 1371.7827802048.

The spelling of 2581404369 in words is "two billion, five hundred eighty-one million, four hundred four thousand, three hundred sixty-nine".