15421688719 has 2 divisors, whose sum is σ = 15421688720. Its totient is φ = 15421688718.

The previous prime is 15421688717. The next prime is 15421688731. The reversal of 15421688719 is 91788612451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15421688719 - 2¹ = 15421688717 is a prime.

It is a super-2 number, since 2×15421688719² (a number of 21 digits) contains 22 as substring.

Together with 15421688717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15421688717) 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, 7710844359 + 7710844360.

It is an arithmetic number, because the mean of its divisors is an integer number (7710844360).

Almost surely, 2^15421688719 is an apocalyptic number.

15421688719 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421688719 is an equidigital number, since it uses as much as digits as its factorization.

15421688719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The spelling of 15421688719 in words is "fifteen billion, four hundred twenty-one million, six hundred eighty-eight thousand, seven hundred nineteen".