2580999905 has 16 divisors (see below), whose sum is σ = 3380280768. Its totient is φ = 1876248000.

The previous prime is 2580999833. The next prime is 2580999907. The reversal of 2580999905 is 5099990852.

It is not a de Polignac number, because 2580999905 - 2²² = 2576805601 is a prime.

It is a super-2 number, since 2×2580999905² = 13323121019220018050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2580999907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129935 + ... + 148475.

It is an arithmetic number, because the mean of its divisors is an integer number (211267548).

Almost surely, 2^2580999905 is an apocalyptic number.

It is an amenable number.

2580999905 is a deficient number, since it is larger than the sum of its proper divisors (799280863).

2580999905 is a wasteful number, since it uses less digits than its factorization.

2580999905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21088.

The product of its (nonzero) digits is 2624400, while the sum is 56.

The square root of 2580999905 is about 50803.5422485480. The cubic root of 2580999905 is about 1371.7111311265.

The spelling of 2580999905 in words is "two billion, five hundred eighty million, nine hundred ninety-nine thousand, nine hundred five".