15664299049937 has 2 divisors, whose sum is σ = 15664299049938. Its totient is φ = 15664299049936.

The previous prime is 15664299049921. The next prime is 15664299049961. The reversal of 15664299049937 is 73994099246651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10182538438081 + 5481760611856 = 3191009^2 + 2341316^2 .

It is an emirp because it is prime and its reverse (73994099246651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15664299049937 - 2⁴ = 15664299049921 is a prime.

It is not a weakly prime, because it can be changed into another prime (15664299049967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7832149524968 + 7832149524969.

It is an arithmetic number, because the mean of its divisors is an integer number (7832149524969).

Almost surely, 2^{15664299049937} is an apocalyptic number.

It is an amenable number.

15664299049937 is a deficient number, since it is larger than the sum of its proper divisors (1).

15664299049937 is an equidigital number, since it uses as much as digits as its factorization.

15664299049937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793618560, while the sum is 74.

The spelling of 15664299049937 in words is "fifteen trillion, six hundred sixty-four billion, two hundred ninety-nine million, forty-nine thousand, nine hundred thirty-seven".