21152164644662 has 8 divisors (see below), whose sum is σ = 31730798121696. Its totient is φ = 10575231937432.

The previous prime is 21152164644641. The next prime is 21152164644673. The reversal of 21152164644662 is 26644646125112.

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

It is a super-2 number, since 2×21152164644662² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21152164644662.

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, 425161358 + ... + 425211105.

It is an arithmetic number, because the mean of its divisors is an integer number (3966349765212).

Almost surely, 2^{21152164644662} is an apocalyptic number.

21152164644662 is a deficient number, since it is larger than the sum of its proper divisors (10578633477034).

21152164644662 is a wasteful number, since it uses less digits than its factorization.

21152164644662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850384902.

The product of its digits is 3317760, while the sum is 50.

The spelling of 21152164644662 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred sixty-four million, six hundred forty-four thousand, six hundred sixty-two".