26861635605 has 96 divisors (see below), whose sum is σ = 52785648000. Its totient is φ = 11598225408.

The previous prime is 26861635601. The next prime is 26861635627. The reversal of 26861635605 is 50653616862.

It is not a de Polignac number, because 26861635605 - 2² = 26861635601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26861635601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4926921 + ... + 4932369.

It is an arithmetic number, because the mean of its divisors is an integer number (549850500).

Almost surely, 2^26861635605 is an apocalyptic number.

It is an amenable number.

26861635605 is a deficient number, since it is larger than the sum of its proper divisors (25924012395).

26861635605 is a wasteful number, since it uses less digits than its factorization.

26861635605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843 (or 5836 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 26861635605 in words is "twenty-six billion, eight hundred sixty-one million, six hundred thirty-five thousand, six hundred five".