26218786157 has 2 divisors, whose sum is σ = 26218786158. Its totient is φ = 26218786156.

The previous prime is 26218786103. The next prime is 26218786171. The reversal of 26218786157 is 75168781262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24890110756 + 1328675401 = 157766^2 + 36451^2 .

It is a cyclic number.

It is not a de Polignac number, because 26218786157 - 2⁶ = 26218786093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26218786099 and 26218786108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26218786057) 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 as a sum of consecutive naturals, namely, 13109393078 + 13109393079.

It is an arithmetic number, because the mean of its divisors is an integer number (13109393079).

Almost surely, 2^26218786157 is an apocalyptic number.

It is an amenable number.

26218786157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26218786157 is an equidigital number, since it uses as much as digits as its factorization.

26218786157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 53.

The spelling of 26218786157 in words is "twenty-six billion, two hundred eighteen million, seven hundred eighty-six thousand, one hundred fifty-seven".