28156417519 has 2 divisors, whose sum is σ = 28156417520. Its totient is φ = 28156417518.

The previous prime is 28156417483. The next prime is 28156417537. The reversal of 28156417519 is 91571465182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28156417519 - 2¹³ = 28156409327 is a prime.

It is a super-2 number, since 2×28156417519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28156417559) 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, 14078208759 + 14078208760.

It is an arithmetic number, because the mean of its divisors is an integer number (14078208760).

Almost surely, 2^28156417519 is an apocalyptic number.

28156417519 is a deficient number, since it is larger than the sum of its proper divisors (1).

28156417519 is an equidigital number, since it uses as much as digits as its factorization.

28156417519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The spelling of 28156417519 in words is "twenty-eight billion, one hundred fifty-six million, four hundred seventeen thousand, five hundred nineteen".