21655120648622 has 8 divisors (see below), whose sum is σ = 32490644378400. Its totient is φ = 10824905855824.

The previous prime is 21655120648619. The next prime is 21655120648633. The reversal of 21655120648622 is 22684602155612.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327224047 + ... + 1327240362.

It is an arithmetic number, because the mean of its divisors is an integer number (4061330547300).

Almost surely, 2^{21655120648622} is an apocalyptic number.

21655120648622 is a deficient number, since it is larger than the sum of its proper divisors (10835523729778).

21655120648622 is a wasteful number, since it uses less digits than its factorization.

21655120648622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654468490.

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 21655120648622 in words is "twenty-one trillion, six hundred fifty-five billion, one hundred twenty million, six hundred forty-eight thousand, six hundred twenty-two".