15664091251 has 2 divisors, whose sum is σ = 15664091252. Its totient is φ = 15664091250.

The previous prime is 15664091249. The next prime is 15664091273. The reversal of 15664091251 is 15219046651.

It is a happy number.

15664091251 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 is a cyclic number.

It is not a de Polignac number, because 15664091251 - 2¹ = 15664091249 is a prime.

Together with 15664091249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15634091251) 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, 7832045625 + 7832045626.

It is an arithmetic number, because the mean of its divisors is an integer number (7832045626).

Almost surely, 2^15664091251 is an apocalyptic number.

15664091251 is a deficient number, since it is larger than the sum of its proper divisors (1).

15664091251 is an equidigital number, since it uses as much as digits as its factorization.

15664091251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 15664091251 in words is "fifteen billion, six hundred sixty-four million, ninety-one thousand, two hundred fifty-one".