16784386542 has 64 divisors (see below), whose sum is σ = 46502208000. Its totient is φ = 4359579840.

The previous prime is 16784386523. The next prime is 16784386547. The reversal of 16784386542 is 24568348761.

It is a happy number.

16784386542 is a `hidden beast` number, since 1 + 67 + 8 + 4 + 38 + 6 + 542 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16784386547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2014167 + ... + 2022482.

It is an arithmetic number, because the mean of its divisors is an integer number (726597000).

Almost surely, 2^16784386542 is an apocalyptic number.

16784386542 is an abundant number, since it is smaller than the sum of its proper divisors (29717821458).

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

16784386542 is a wasteful number, since it uses less digits than its factorization.

16784386542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036678 (or 4036672 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 16784386542 in words is "sixteen billion, seven hundred eighty-four million, three hundred eighty-six thousand, five hundred forty-two".