161420060505 has 32 divisors (see below), whose sum is σ = 284917150080. Its totient is φ = 77384890880.

The previous prime is 161420060497. The next prime is 161420060513. The reversal of 161420060505 is 505060024161.

161420060505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161420060497) and next prime (161420060513).

It is not a de Polignac number, because 161420060505 - 2³ = 161420060497 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 5481402 + ... + 5510771.

It is an arithmetic number, because the mean of its divisors is an integer number (8903660940).

Almost surely, 2^161420060505 is an apocalyptic number.

161420060505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161420060505 is a deficient number, since it is larger than the sum of its proper divisors (123497089575).

161420060505 is a wasteful number, since it uses less digits than its factorization.

161420060505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992281.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 161420060505 its reverse (505060024161), we get a palindrome (666480084666).

The spelling of 161420060505 in words is "one hundred sixty-one billion, four hundred twenty million, sixty thousand, five hundred five".