162640505 has 4 divisors (see below), whose sum is σ = 195168612. Its totient is φ = 130112400.

The previous prime is 162640487. The next prime is 162640507. The reversal of 162640505 is 505046261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26708224 + 135932281 = 5168^2 + 11659^2 .

It is not a de Polignac number, because 162640505 - 2⁶ = 162640441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162640507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16264046 + ... + 16264055.

It is an arithmetic number, because the mean of its divisors is an integer number (48792153).

Almost surely, 2^162640505 is an apocalyptic number.

It is an amenable number.

162640505 is a deficient number, since it is larger than the sum of its proper divisors (32528107).

162640505 is an equidigital number, since it uses as much as digits as its factorization.

162640505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32528106.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 162640505 is about 12753.0586527311. The cubic root of 162640505 is about 545.8536743321.

Adding to 162640505 its reverse (505046261), we get a palindrome (667686766).

The spelling of 162640505 in words is "one hundred sixty-two million, six hundred forty thousand, five hundred five".