16042521601 has 2 divisors, whose sum is σ = 16042521602. Its totient is φ = 16042521600.

The previous prime is 16042521589. The next prime is 16042521659. The reversal of 16042521601 is 10612524061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10070323201 + 5972198400 = 100351^2 + 77280^2 .

It is an emirp because it is prime and its reverse (10612524061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16042521601 - 2⁵ = 16042521569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16042521601.

It is not a weakly prime, because it can be changed into another prime (16042521101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021260800 + 8021260801.

It is an arithmetic number, because the mean of its divisors is an integer number (8021260801).

Almost surely, 2^16042521601 is an apocalyptic number.

It is an amenable number.

16042521601 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042521601 is an equidigital number, since it uses as much as digits as its factorization.

16042521601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 16042521601 in words is "sixteen billion, forty-two million, five hundred twenty-one thousand, six hundred one".