2500085817 has 14 divisors (see below), whose sum is σ = 3748415082. Its totient is φ = 1666723392.

The previous prime is 2500085761. The next prime is 2500085837. The reversal of 2500085817 is 7185800052.

It can be written as a sum of positive squares in only one way, i.e., 1622800656 + 877285161 = 40284^2 + 29619^2 .

It is not a de Polignac number, because 2500085817 - 2¹⁰ = 2500084793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2500085837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1714008 + ... + 1715465.

Almost surely, 2^2500085817 is an apocalyptic number.

2500085817 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2500085817 is a deficient number, since it is larger than the sum of its proper divisors (1248329265).

2500085817 is an frugal number, since it uses more digits than its factorization.

2500085817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429491 (or 3429476 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 2500085817 is about 50000.8581626356. The cubic root of 2500085817 is about 1357.2243376649.

Adding to 2500085817 its reverse (7185800052), we get a palindrome (9685885869).

The spelling of 2500085817 in words is "two billion, five hundred million, eighty-five thousand, eight hundred seventeen".