21152166526063 has 8 divisors (see below), whose sum is σ = 21362029550928. Its totient is φ = 20942529042624.

The previous prime is 21152166526061. The next prime is 21152166526081. The reversal of 21152166526063 is 36062566125112.

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

It is a cyclic number.

It is not a de Polignac number, because 21152166526063 - 2¹ = 21152166526061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152166526061) 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, 56196856 + ... + 56571997.

It is an arithmetic number, because the mean of its divisors is an integer number (2670253693866).

Almost surely, 2^{21152166526063} is an apocalyptic number.

21152166526063 is a deficient number, since it is larger than the sum of its proper divisors (209863024865).

21152166526063 is a wasteful number, since it uses less digits than its factorization.

21152166526063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112770713.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 21152166526063 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred sixty-six million, five hundred twenty-six thousand, sixty-three".