15985184953 has 2 divisors, whose sum is σ = 15985184954. Its totient is φ = 15985184952.

The previous prime is 15985184947. The next prime is 15985185019. The reversal of 15985184953 is 35948158951.

It is a happy number.

15985184953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15665776569 + 319408384 = 125163^2 + 17872^2 .

It is an emirp because it is prime and its reverse (35948158951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15985184953 is a prime.

It is a super-2 number, since 2×15985184953² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15985184903) 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, 7992592476 + 7992592477.

It is an arithmetic number, because the mean of its divisors is an integer number (7992592477).

Almost surely, 2^15985184953 is an apocalyptic number.

It is an amenable number.

15985184953 is a deficient number, since it is larger than the sum of its proper divisors (1).

15985184953 is an equidigital number, since it uses as much as digits as its factorization.

15985184953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776000, while the sum is 58.

The spelling of 15985184953 in words is "fifteen billion, nine hundred eighty-five million, one hundred eighty-four thousand, nine hundred fifty-three".