26196563861 has 16 divisors (see below), whose sum is σ = 29777529600. Its totient is φ = 22846235328.

The previous prime is 26196563849. The next prime is 26196563873. The reversal of 26196563861 is 16836569162.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26196563849) and next prime (26196563873).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26196563861 is a prime.

It is a super-3 number, since 3×26196563861³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26196563801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53846 + ... + 235143.

It is an arithmetic number, because the mean of its divisors is an integer number (1861095600).

Almost surely, 2^26196563861 is an apocalyptic number.

It is an amenable number.

26196563861 is a deficient number, since it is larger than the sum of its proper divisors (3580965739).

26196563861 is a wasteful number, since it uses less digits than its factorization.

26196563861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289388.

The product of its digits is 2799360, while the sum is 53.

The spelling of 26196563861 in words is "twenty-six billion, one hundred ninety-six million, five hundred sixty-three thousand, eight hundred sixty-one".