26768121187 has 4 divisors (see below), whose sum is σ = 26779706416. Its totient is φ = 26756535960.

The previous prime is 26768121157. The next prime is 26768121197. The reversal of 26768121187 is 78112186762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78112186762 = 2 ⋅39056093381.

It is a cyclic number.

It is not a de Polignac number, because 26768121187 - 2⁷ = 26768121059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26768121187.

It is not an unprimeable number, because it can be changed into a prime (26768121157) 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, 5789148 + ... + 5793769.

It is an arithmetic number, because the mean of its divisors is an integer number (6694926604).

Almost surely, 2^26768121187 is an apocalyptic number.

26768121187 is a deficient number, since it is larger than the sum of its proper divisors (11585229).

26768121187 is a wasteful number, since it uses less digits than its factorization.

26768121187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11585228.

The product of its digits is 451584, while the sum is 49.

The spelling of 26768121187 in words is "twenty-six billion, seven hundred sixty-eight million, one hundred twenty-one thousand, one hundred eighty-seven".