16442023645621 has 8 divisors (see below), whose sum is σ = 19779878070080. Its totient is φ = 13351417697088.

The previous prime is 16442023645609. The next prime is 16442023645643. The reversal of 16442023645621 is 12654632024461.

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 16442023645621 - 2⁵ = 16442023645589 is a prime.

It is a super-3 number, since 3×16442023645621³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442023648621) 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, 61812118836 + ... + 61812119101.

It is an arithmetic number, because the mean of its divisors is an integer number (2472484758760).

Almost surely, 2^{16442023645621} is an apocalyptic number.

It is an amenable number.

16442023645621 is a deficient number, since it is larger than the sum of its proper divisors (3337854424459).

16442023645621 is a wasteful number, since it uses less digits than its factorization.

16442023645621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123624237963.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 16442023645621 in words is "sixteen trillion, four hundred forty-two billion, twenty-three million, six hundred forty-five thousand, six hundred twenty-one".