25716678806 has 16 divisors (see below), whose sum is σ = 47476945824. Its totient is φ = 10173631104.

The previous prime is 25716678761. The next prime is 25716678853. The reversal of 25716678806 is 60887661752.

It is a super-2 number, since 2×25716678806² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 70650035 + ... + 70650398.

It is an arithmetic number, because the mean of its divisors is an integer number (2967309114).

Almost surely, 2^25716678806 is an apocalyptic number.

25716678806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25716678806 is a deficient number, since it is larger than the sum of its proper divisors (21760267018).

25716678806 is a wasteful number, since it uses less digits than its factorization.

25716678806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141300455.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 25716678806 in words is "twenty-five billion, seven hundred sixteen million, six hundred seventy-eight thousand, eight hundred six".