220406162505 has 32 divisors (see below), whose sum is σ = 354676952448. Its totient is φ = 116874547200.

The previous prime is 220406162461. The next prime is 220406162521. The reversal of 220406162505 is 505261604022.

It is not a de Polignac number, because 220406162505 - 2⁹ = 220406161993 is a prime.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 23743465 + ... + 23752745.

It is an arithmetic number, because the mean of its divisors is an integer number (11083654764).

Almost surely, 2^220406162505 is an apocalyptic number.

It is an amenable number.

220406162505 is a deficient number, since it is larger than the sum of its proper divisors (134270789943).

220406162505 is a wasteful number, since it uses less digits than its factorization.

220406162505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18217.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 220406162505 its reverse (505261604022), we get a palindrome (725667766527).

The spelling of 220406162505 in words is "two hundred twenty billion, four hundred six million, one hundred sixty-two thousand, five hundred five".