15688719401 has 2 divisors, whose sum is σ = 15688719402. Its totient is φ = 15688719400.

The previous prime is 15688719353. The next prime is 15688719421. The reversal of 15688719401 is 10491788651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11763571600 + 3925147801 = 108460^2 + 62651^2 .

It is an emirp because it is prime and its reverse (10491788651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15688719401 is a prime.

It is a super-2 number, since 2×15688719401² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15688719401.

It is not a weakly prime, because it can be changed into another prime (15688719421) 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, 7844359700 + 7844359701.

It is an arithmetic number, because the mean of its divisors is an integer number (7844359701).

Almost surely, 2^15688719401 is an apocalyptic number.

It is an amenable number.

15688719401 is a deficient number, since it is larger than the sum of its proper divisors (1).

15688719401 is an equidigital number, since it uses as much as digits as its factorization.

15688719401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 15688719401 in words is "fifteen billion, six hundred eighty-eight million, seven hundred nineteen thousand, four hundred one".