21768585357201 has 8 divisors (see below), whose sum is σ = 29039170558944. Its totient is φ = 14505195196800.

The previous prime is 21768585357163. The next prime is 21768585357251. The reversal of 21768585357201 is 10275358586712.

It is a happy number.

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

It is not a de Polignac number, because 21768585357201 - 2⁷ = 21768585357073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21768585357251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798753275 + ... + 1798765376.

It is an arithmetic number, because the mean of its divisors is an integer number (3629896319868).

Almost surely, 2^{21768585357201} is an apocalyptic number.

It is an amenable number.

21768585357201 is a deficient number, since it is larger than the sum of its proper divisors (7270585201743).

21768585357201 is a wasteful number, since it uses less digits than its factorization.

21768585357201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597520671.

The product of its (nonzero) digits is 28224000, while the sum is 60.

The spelling of 21768585357201 in words is "twenty-one trillion, seven hundred sixty-eight billion, five hundred eighty-five million, three hundred fifty-seven thousand, two hundred one".