2002545785 has 4 divisors (see below), whose sum is σ = 2403054948. Its totient is φ = 1602036624.

The previous prime is 2002545763. The next prime is 2002545817. The reversal of 2002545785 is 5875452002.

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 385219129 + 1617326656 = 19627^2 + 40216^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002545785 - 2⁸ = 2002545529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 200254574 + ... + 200254583.

It is an arithmetic number, because the mean of its divisors is an integer number (600763737).

Almost surely, 2^2002545785 is an apocalyptic number.

It is an amenable number.

2002545785 is a deficient number, since it is larger than the sum of its proper divisors (400509163).

2002545785 is an equidigital number, since it uses as much as digits as its factorization.

2002545785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400509162.

The product of its (nonzero) digits is 112000, while the sum is 38.

The square root of 2002545785 is about 44749.8132398338. The cubic root of 2002545785 is about 1260.4554045853.

Adding to 2002545785 its reverse (5875452002), we get a palindrome (7877997787).

The spelling of 2002545785 in words is "two billion, two million, five hundred forty-five thousand, seven hundred eighty-five".