16303641681 has 16 divisors (see below), whose sum is σ = 21956184000. Its totient is φ = 10760234688.

The previous prime is 16303641667. The next prime is 16303641691. The reversal of 16303641681 is 18614630361.

It is not a de Polignac number, because 16303641681 - 2⁶ = 16303641617 is a prime.

It is a super-2 number, since 2×16303641681² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16303641691) 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, 480835 + ... + 513623.

It is an arithmetic number, because the mean of its divisors is an integer number (1372261500).

Almost surely, 2^16303641681 is an apocalyptic number.

It is an amenable number.

16303641681 is a deficient number, since it is larger than the sum of its proper divisors (5652542319).

16303641681 is a wasteful number, since it uses less digits than its factorization.

16303641681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34448.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 16303641681 in words is "sixteen billion, three hundred three million, six hundred forty-one thousand, six hundred eighty-one".