21161014646 has 8 divisors (see below), whose sum is σ = 31902647040. Its totient is φ = 10526798968.

The previous prime is 21161014607. The next prime is 21161014663. The reversal of 21161014646 is 64641016112.

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, 26853686 + ... + 26854473.

It is an arithmetic number, because the mean of its divisors is an integer number (3987830880).

Almost surely, 2^21161014646 is an apocalyptic number.

21161014646 is a deficient number, since it is larger than the sum of its proper divisors (10741632394).

21161014646 is a wasteful number, since it uses less digits than its factorization.

21161014646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53708358.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21161014646 in words is "twenty-one billion, one hundred sixty-one million, fourteen thousand, six hundred forty-six".