16506550623 has 16 divisors (see below), whose sum is σ = 22093128576. Its totient is φ = 10962225120.

The previous prime is 16506550601. The next prime is 16506550661. The reversal of 16506550623 is 32605560561.

It is not a de Polignac number, because 16506550623 - 2¹⁰ = 16506549599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506550663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357336 + ... + 1369442.

It is an arithmetic number, because the mean of its divisors is an integer number (1380820536).

Almost surely, 2^16506550623 is an apocalyptic number.

16506550623 is a deficient number, since it is larger than the sum of its proper divisors (5586577953).

16506550623 is a wasteful number, since it uses less digits than its factorization.

16506550623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814.

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 16506550623 in words is "sixteen billion, five hundred six million, five hundred fifty thousand, six hundred twenty-three".