15857142871 has 2 divisors, whose sum is σ = 15857142872. Its totient is φ = 15857142870.

The previous prime is 15857142869. The next prime is 15857142877. The reversal of 15857142871 is 17824175851.

15857142871 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 15857142871 - 2¹ = 15857142869 is a prime.

It is a super-2 number, since 2×15857142871² (a number of 21 digits) contains 22 as substring.

Together with 15857142869, 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 (15857142877) 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, 7928571435 + 7928571436.

It is an arithmetic number, because the mean of its divisors is an integer number (7928571436).

Almost surely, 2^15857142871 is an apocalyptic number.

15857142871 is a deficient number, since it is larger than the sum of its proper divisors (1).

15857142871 is an equidigital number, since it uses as much as digits as its factorization.

15857142871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627200, while the sum is 49.

The spelling of 15857142871 in words is "fifteen billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred seventy-one".