161562506519 has 2 divisors, whose sum is σ = 161562506520. Its totient is φ = 161562506518.

The previous prime is 161562506503. The next prime is 161562506551. The reversal of 161562506519 is 915605265161.

161562506519 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 161562506519 - 2⁴ = 161562506503 is a prime.

It is a super-2 number, since 2×161562506519² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161562505519) 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, 80781253259 + 80781253260.

It is an arithmetic number, because the mean of its divisors is an integer number (80781253260).

Almost surely, 2^161562506519 is an apocalyptic number.

161562506519 is a deficient number, since it is larger than the sum of its proper divisors (1).

161562506519 is an equidigital number, since it uses as much as digits as its factorization.

161562506519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 47.

The spelling of 161562506519 in words is "one hundred sixty-one billion, five hundred sixty-two million, five hundred six thousand, five hundred nineteen".