25716678805 has 16 divisors (see below), whose sum is σ = 30921727104. Its totient is φ = 20532248640.

The previous prime is 25716678761. The next prime is 25716678853. The reversal of 25716678805 is 50887661752.

It is not a de Polignac number, because 25716678805 - 2⁷ = 25716678677 is a prime.

It is a super-2 number, since 2×25716678805² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 8027334 + ... + 8030536.

It is an arithmetic number, because the mean of its divisors is an integer number (1932607944).

Almost surely, 2^25716678805 is an apocalyptic number.

It is an amenable number.

25716678805 is a deficient number, since it is larger than the sum of its proper divisors (5205048299).

25716678805 is a wasteful number, since it uses less digits than its factorization.

25716678805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 25716678805 in words is "twenty-five billion, seven hundred sixteen million, six hundred seventy-eight thousand, eight hundred five".