16531884778753 has 2 divisors, whose sum is σ = 16531884778754. Its totient is φ = 16531884778752.

The previous prime is 16531884778729. The next prime is 16531884778763. The reversal of 16531884778753 is 35787748813561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12808038484224 + 3723846294529 = 3578832^2 + 1929727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16531884778753 is a prime.

It is not a weakly prime, because it can be changed into another prime (16531884778763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8265942389376 + 8265942389377.

It is an arithmetic number, because the mean of its divisors is an integer number (8265942389377).

Almost surely, 2^{16531884778753} is an apocalyptic number.

It is an amenable number.

16531884778753 is a deficient number, since it is larger than the sum of its proper divisors (1).

16531884778753 is an equidigital number, since it uses as much as digits as its factorization.

16531884778753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 948326400, while the sum is 73.

The spelling of 16531884778753 in words is "sixteen trillion, five hundred thirty-one billion, eight hundred eighty-four million, seven hundred seventy-eight thousand, seven hundred fifty-three".