2145582019585 has 4 divisors (see below), whose sum is σ = 2574698423508. Its totient is φ = 1716465615664.

The previous prime is 2145582019577. The next prime is 2145582019601. The reversal of 2145582019585 is 5859102855412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 721101577329 + 1424480442256 = 849177^2 + 1193516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145582019585 - 2³ = 2145582019577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214558201954 + ... + 214558201963.

It is an arithmetic number, because the mean of its divisors is an integer number (643674605877).

Almost surely, 2^{2145582019585} is an apocalyptic number.

It is an amenable number.

2145582019585 is a deficient number, since it is larger than the sum of its proper divisors (429116403923).

2145582019585 is an equidigital number, since it uses as much as digits as its factorization.

2145582019585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429116403922.

The product of its (nonzero) digits is 5760000, while the sum is 55.

The spelling of 2145582019585 in words is "two trillion, one hundred forty-five billion, five hundred eighty-two million, nineteen thousand, five hundred eighty-five".