15688711361 has 2 divisors, whose sum is σ = 15688711362. Its totient is φ = 15688711360.

The previous prime is 15688711349. The next prime is 15688711391. The reversal of 15688711361 is 16311788651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15337336336 + 351375025 = 123844^2 + 18745^2 .

It is a cyclic number.

It is not a de Polignac number, because 15688711361 - 2²⁶ = 15621602497 is a prime.

It is a super-2 number, since 2×15688711361² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15688711391) 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, 7844355680 + 7844355681.

It is an arithmetic number, because the mean of its divisors is an integer number (7844355681).

Almost surely, 2^15688711361 is an apocalyptic number.

It is an amenable number.

15688711361 is a deficient number, since it is larger than the sum of its proper divisors (1).

15688711361 is an equidigital number, since it uses as much as digits as its factorization.

15688711361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 47.

The spelling of 15688711361 in words is "fifteen billion, six hundred eighty-eight million, seven hundred eleven thousand, three hundred sixty-one".