16236045816681 has 16 divisors (see below), whose sum is σ = 21657006106560. Its totient is φ = 10819558428480.

The previous prime is 16236045816647. The next prime is 16236045816787. The reversal of 16236045816681 is 18661854063261.

It is a happy number.

It is not a de Polignac number, because 16236045816681 - 2⁹ = 16236045816169 is a prime.

It is a super-2 number, since 2×16236045816681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16236045816631) 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, 249066750 + ... + 249131928.

It is an arithmetic number, because the mean of its divisors is an integer number (1353562881660).

Almost surely, 2^{16236045816681} is an apocalyptic number.

It is an amenable number.

16236045816681 is a deficient number, since it is larger than the sum of its proper divisors (5420960289879).

16236045816681 is a wasteful number, since it uses less digits than its factorization.

16236045816681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98216.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 16236045816681 in words is "sixteen trillion, two hundred thirty-six billion, forty-five million, eight hundred sixteen thousand, six hundred eighty-one".