16622553023991 has 12 divisors (see below), whose sum is σ = 25274057229720. Its totient is φ = 10498454541360.

The previous prime is 16622553023963. The next prime is 16622553024079. The reversal of 16622553023991 is 19932035522661.

16622553023991 is a `hidden beast` number, since 1 + 6 + 62 + 2 + 553 + 0 + 23 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 16622553023991 - 2⁷ = 16622553023863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622553043991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48603956040 + ... + 48603956381.

It is an arithmetic number, because the mean of its divisors is an integer number (2106171435810).

Almost surely, 2^{16622553023991} is an apocalyptic number.

16622553023991 is a deficient number, since it is larger than the sum of its proper divisors (8651504205729).

16622553023991 is a wasteful number, since it uses less digits than its factorization.

16622553023991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97207912446 (or 97207912443 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 16622553023991 in words is "sixteen trillion, six hundred twenty-two billion, five hundred fifty-three million, twenty-three thousand, nine hundred ninety-one".