16536122401 has 2 divisors, whose sum is σ = 16536122402. Its totient is φ = 16536122400.

The previous prime is 16536122357. The next prime is 16536122429. The reversal of 16536122401 is 10422163561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15030760000 + 1505362401 = 122600^2 + 38799^2 .

It is an emirp because it is prime and its reverse (10422163561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16536122401 - 2¹¹ = 16536120353 is a prime.

It is not a weakly prime, because it can be changed into another prime (16536122201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8268061200 + 8268061201.

It is an arithmetic number, because the mean of its divisors is an integer number (8268061201).

Almost surely, 2^16536122401 is an apocalyptic number.

It is an amenable number.

16536122401 is a deficient number, since it is larger than the sum of its proper divisors (1).

16536122401 is an equidigital number, since it uses as much as digits as its factorization.

16536122401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 16536122401 its reverse (10422163561), we get a palindrome (26958285962).

The spelling of 16536122401 in words is "sixteen billion, five hundred thirty-six million, one hundred twenty-two thousand, four hundred one".