2580105781 has 8 divisors (see below), whose sum is σ = 2815327584. Its totient is φ = 2344995120.

The previous prime is 2580105767. The next prime is 2580105809. The reversal of 2580105781 is 1875010852.

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

It is a cyclic number.

It is not a de Polignac number, because 2580105781 - 2³¹ = 432622133 is a prime.

It is a super-2 number, since 2×2580105781² = 13313891682299239922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2580105781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580105721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25155 + ... + 76111.

It is an arithmetic number, because the mean of its divisors is an integer number (351915948).

Almost surely, 2^2580105781 is an apocalyptic number.

It is an amenable number.

2580105781 is a deficient number, since it is larger than the sum of its proper divisors (235221803).

2580105781 is a wasteful number, since it uses less digits than its factorization.

2580105781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55571.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 2580105781 is about 50794.7416668300. The cubic root of 2580105781 is about 1371.5527142928.

The spelling of 2580105781 in words is "two billion, five hundred eighty million, one hundred five thousand, seven hundred eighty-one".