16241522156621 has 8 divisors (see below), whose sum is σ = 16254430900344. Its totient is φ = 16228618531840.

The previous prime is 16241522156569. The next prime is 16241522156623. The reversal of 16241522156621 is 12665122514261.

It can be written as a sum of positive squares in 4 ways, for example, as 53090611396 + 16188431545225 = 230414^2 + 4023485^2 .

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 16241522156621 - 2³⁰ = 16240448414797 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 (16241522156623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080991 + ... + 7635411.

It is an arithmetic number, because the mean of its divisors is an integer number (2031803862543).

Almost surely, 2^{16241522156621} is an apocalyptic number.

It is an amenable number.

16241522156621 is a deficient number, since it is larger than the sum of its proper divisors (12908743723).

16241522156621 is a wasteful number, since it uses less digits than its factorization.

16241522156621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559471.

The product of its digits is 345600, while the sum is 44.

The spelling of 16241522156621 in words is "sixteen trillion, two hundred forty-one billion, five hundred twenty-two million, one hundred fifty-six thousand, six hundred twenty-one".