15664635983 has 2 divisors, whose sum is σ = 15664635984. Its totient is φ = 15664635982.

The previous prime is 15664635913. The next prime is 15664636019. The reversal of 15664635983 is 38953646651.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15664635983 - 2¹⁴ = 15664619599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15664635913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7832317991 + 7832317992.

It is an arithmetic number, because the mean of its divisors is an integer number (7832317992).

Almost surely, 2^15664635983 is an apocalyptic number.

15664635983 is a deficient number, since it is larger than the sum of its proper divisors (1).

15664635983 is an equidigital number, since it uses as much as digits as its factorization.

15664635983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13996800, while the sum is 56.

The spelling of 15664635983 in words is "fifteen billion, six hundred sixty-four million, six hundred thirty-five thousand, nine hundred eighty-three".