16650431424 has 168 divisors, whose sum is σ = 54804746880. Its totient is φ = 4779993600.

The previous prime is 16650431389. The next prime is 16650431429. The reversal of 16650431424 is 42413405661.

16650431424 is a `hidden beast` number, since 1 + 6 + 6 + 504 + 3 + 142 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16650431429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51229 + ... + 189539.

Almost surely, 2^16650431424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16650431424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27402373440).

16650431424 is an abundant number, since it is smaller than the sum of its proper divisors (38154315456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16650431424 is a wasteful number, since it uses less digits than its factorization.

16650431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138359 (or 138346 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 16650431424 in words is "sixteen billion, six hundred fifty million, four hundred thirty-one thousand, four hundred twenty-four".