25185617083 has 4 divisors (see below), whose sum is σ = 27475218648. Its totient is φ = 22896015520.

The previous prime is 25185617059. The next prime is 25185617087. The reversal of 25185617083 is 38071658152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25185617083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25185617087) 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 3 ways as a sum of consecutive naturals, for example, 1144800766 + ... + 1144800787.

It is an arithmetic number, because the mean of its divisors is an integer number (6868804662).

Almost surely, 2^25185617083 is an apocalyptic number.

25185617083 is a deficient number, since it is larger than the sum of its proper divisors (2289601565).

25185617083 is a wasteful number, since it uses less digits than its factorization.

25185617083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289601564.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 25185617083 in words is "twenty-five billion, one hundred eighty-five million, six hundred seventeen thousand, eighty-three".