161502040505 has 32 divisors (see below), whose sum is σ = 219735210240. Its totient is φ = 112965408000.

The previous prime is 161502040499. The next prime is 161502040523. The reversal of 161502040505 is 505040205161.

It is a happy number.

It is not a de Polignac number, because 161502040505 - 2¹⁰ = 161502039481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10491044 + ... + 10506426.

It is an arithmetic number, because the mean of its divisors is an integer number (6866725320).

Almost surely, 2^161502040505 is an apocalyptic number.

It is an amenable number.

161502040505 is a deficient number, since it is larger than the sum of its proper divisors (58233169735).

161502040505 is a wasteful number, since it uses less digits than its factorization.

161502040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23921.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 161502040505 its reverse (505040205161), we get a palindrome (666542245666).

The spelling of 161502040505 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, five hundred five".