26861742663 has 16 divisors (see below), whose sum is σ = 40934939136. Its totient is φ = 15348532320.

The previous prime is 26861742659. The next prime is 26861742673. The reversal of 26861742663 is 36624716862.

It is a happy number.

It is not a de Polignac number, because 26861742663 - 2² = 26861742659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26861742673) 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, 366045 + ... + 433257.

It is an arithmetic number, because the mean of its divisors is an integer number (2558433696).

Almost surely, 2^26861742663 is an apocalyptic number.

26861742663 is a deficient number, since it is larger than the sum of its proper divisors (14073196473).

26861742663 is a wasteful number, since it uses less digits than its factorization.

26861742663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86254.

The product of its digits is 3483648, while the sum is 51.

The spelling of 26861742663 in words is "twenty-six billion, eight hundred sixty-one million, seven hundred forty-two thousand, six hundred sixty-three".