26197558285 has 4 divisors (see below), whose sum is σ = 31437069948. Its totient is φ = 20958046624.

The previous prime is 26197558273. The next prime is 26197558301. The reversal of 26197558285 is 58285579162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58285579162 = 2 ⋅29142789581.

It can be written as a sum of positive squares in 2 ways, for example, as 17993003044 + 8204555241 = 134138^2 + 90579^2 .

It is a cyclic number.

It is not a de Polignac number, because 26197558285 - 2¹⁷ = 26197427213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2619755824 + ... + 2619755833.

It is an arithmetic number, because the mean of its divisors is an integer number (7859267487).

Almost surely, 2^26197558285 is an apocalyptic number.

It is an amenable number.

26197558285 is a deficient number, since it is larger than the sum of its proper divisors (5239511663).

26197558285 is an equidigital number, since it uses as much as digits as its factorization.

26197558285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239511662.

The product of its digits is 12096000, while the sum is 58.

The spelling of 26197558285 in words is "twenty-six billion, one hundred ninety-seven million, five hundred fifty-eight thousand, two hundred eighty-five".