26691691622 has 8 divisors (see below), whose sum is σ = 40137382872. Its totient is φ = 13312564000.

The previous prime is 26691691597. The next prime is 26691691643. The reversal of 26691691622 is 22619619662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16639904 + ... + 16641507.

It is an arithmetic number, because the mean of its divisors is an integer number (5017172859).

Almost surely, 2^26691691622 is an apocalyptic number.

26691691622 is a deficient number, since it is larger than the sum of its proper divisors (13445691250).

26691691622 is a wasteful number, since it uses less digits than its factorization.

26691691622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33281814.

The product of its digits is 839808, while the sum is 50.

The spelling of 26691691622 in words is "twenty-six billion, six hundred ninety-one million, six hundred ninety-one thousand, six hundred twenty-two".