15857145719 has 2 divisors, whose sum is σ = 15857145720. Its totient is φ = 15857145718.

The previous prime is 15857145697. The next prime is 15857145721. The reversal of 15857145719 is 91754175851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15857145719 is a prime.

It is a super-2 number, since 2×15857145719² (a number of 21 digits) contains 22 as substring.

Together with 15857145721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15857145769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7928572859 + 7928572860.

It is an arithmetic number, because the mean of its divisors is an integer number (7928572860).

Almost surely, 2^15857145719 is an apocalyptic number.

15857145719 is a deficient number, since it is larger than the sum of its proper divisors (1).

15857145719 is an equidigital number, since it uses as much as digits as its factorization.

15857145719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764000, while the sum is 53.

The spelling of 15857145719 in words is "fifteen billion, eight hundred fifty-seven million, one hundred forty-five thousand, seven hundred nineteen".