16302520681 has 8 divisors (see below), whose sum is σ = 17017208064. Its totient is φ = 15588323520.

The previous prime is 16302520669. The next prime is 16302520693. The reversal of 16302520681 is 18602520361.

It is an interprime number because it is at equal distance from previous prime (16302520669) and next prime (16302520693).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16302520681 is a prime.

It is a super-2 number, since 2×16302520681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16302520981) 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, 53760 + ... + 188401.

It is an arithmetic number, because the mean of its divisors is an integer number (2127151008).

Almost surely, 2^16302520681 is an apocalyptic number.

It is an amenable number.

16302520681 is a deficient number, since it is larger than the sum of its proper divisors (714687383).

16302520681 is a wasteful number, since it uses less digits than its factorization.

16302520681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245111.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 16302520681 in words is "sixteen billion, three hundred two million, five hundred twenty thousand, six hundred eighty-one".