25885317061 has 4 divisors (see below), whose sum is σ = 25889076000. Its totient is φ = 25881558124.

The previous prime is 25885316993. The next prime is 25885317103. The reversal of 25885317061 is 16071358852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25885317061 is a prime.

It is a super-3 number, since 3×25885317061³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25885317361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869121 + ... + 1882918.

It is an arithmetic number, because the mean of its divisors is an integer number (6472269000).

Almost surely, 2^25885317061 is an apocalyptic number.

It is an amenable number.

25885317061 is a deficient number, since it is larger than the sum of its proper divisors (3758939).

25885317061 is an equidigital number, since it uses as much as digits as its factorization.

25885317061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758938.

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

The spelling of 25885317061 in words is "twenty-five billion, eight hundred eighty-five million, three hundred seventeen thousand, sixty-one".