26081891385 has 128 divisors (see below), whose sum is σ = 51478364160. Its totient is φ = 11119718400.

The previous prime is 26081891383. The next prime is 26081891389. The reversal of 26081891385 is 58319818062.

It is not a de Polignac number, because 26081891385 - 2¹ = 26081891383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (26081891383) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2516524 + ... + 2526866.

It is an arithmetic number, because the mean of its divisors is an integer number (402174720).

Almost surely, 2^26081891385 is an apocalyptic number.

It is an amenable number.

26081891385 is a deficient number, since it is larger than the sum of its proper divisors (25396472775).

26081891385 is a wasteful number, since it uses less digits than its factorization.

26081891385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10439.

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 26081891385 in words is "twenty-six billion, eighty-one million, eight hundred ninety-one thousand, three hundred eighty-five".