26221933646 has 8 divisors (see below), whose sum is σ = 39401786424. Its totient is φ = 13088004840.

The previous prime is 26221933597. The next prime is 26221933663. The reversal of 26221933646 is 64633912262.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 26221933597 and 26221933606.

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, 11479565 + ... + 11481848.

It is an arithmetic number, because the mean of its divisors is an integer number (4925223303).

Almost surely, 2^26221933646 is an apocalyptic number.

26221933646 is a deficient number, since it is larger than the sum of its proper divisors (13179852778).

26221933646 is a wasteful number, since it uses less digits than its factorization.

26221933646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22961986.

The product of its digits is 559872, while the sum is 44.

The spelling of 26221933646 in words is "twenty-six billion, two hundred twenty-one million, nine hundred thirty-three thousand, six hundred forty-six".