16633646542 has 16 divisors (see below), whose sum is σ = 25227970560. Its totient is φ = 8224549272.

The previous prime is 16633646503. The next prime is 16633646543. The reversal of 16633646542 is 24564633661.

It is a junction number, because it is equal to n+sod(n) for n = 16633646492 and 16633646501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16633646543) 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, 91963 + ... + 204265.

It is an arithmetic number, because the mean of its divisors is an integer number (1576748160).

Almost surely, 2^16633646542 is an apocalyptic number.

16633646542 is a deficient number, since it is larger than the sum of its proper divisors (8594324018).

16633646542 is a wasteful number, since it uses less digits than its factorization.

16633646542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113127.

The product of its digits is 1866240, while the sum is 46.

It can be divided in two parts, 166336 and 46542, that added together give a triangular number (212878 = T₆₅₂).

The spelling of 16633646542 in words is "sixteen billion, six hundred thirty-three million, six hundred forty-six thousand, five hundred forty-two".