216178736042 has 4 divisors (see below), whose sum is σ = 324268104066. Its totient is φ = 108089368020.

The previous prime is 216178736027. The next prime is 216178736087. The reversal of 216178736042 is 240637871612.

216178736042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 181015360681 + 35163375361 = 425459^2 + 187519^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54044684009 + ... + 54044684012.

Almost surely, 2^216178736042 is an apocalyptic number.

216178736042 is a deficient number, since it is larger than the sum of its proper divisors (108089368024).

216178736042 is a wasteful number, since it uses less digits than its factorization.

216178736042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108089368023.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 216178736042 in words is "two hundred sixteen billion, one hundred seventy-eight million, seven hundred thirty-six thousand, forty-two".