26312678857 has 4 divisors (see below), whose sum is σ = 26872523136. Its totient is φ = 25752834580.

The previous prime is 26312678741. The next prime is 26312678911. The reversal of 26312678857 is 75887621362.

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-26312678857 is a prime.

It is a super-2 number, since 2×26312678857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26312678798 and 26312678807.

It is not an unprimeable number, because it can be changed into a prime (26312678957) 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, 279922069 + ... + 279922162.

It is an arithmetic number, because the mean of its divisors is an integer number (6718130784).

Almost surely, 2^26312678857 is an apocalyptic number.

It is an amenable number.

26312678857 is a deficient number, since it is larger than the sum of its proper divisors (559844279).

26312678857 is an equidigital number, since it uses as much as digits as its factorization.

26312678857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559844278.

The product of its digits is 6773760, while the sum is 55.

The spelling of 26312678857 in words is "twenty-six billion, three hundred twelve million, six hundred seventy-eight thousand, eight hundred fifty-seven".