131324164465 has 8 divisors (see below), whose sum is σ = 169711228008. Its totient is φ = 96977844480.

The previous prime is 131324164459. The next prime is 131324164469. The reversal of 131324164465 is 564461423131.

It can be written as a sum of positive squares in 4 ways, for example, as 765518224 + 130558646241 = 27668^2 + 361329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131324164465 - 2³¹ = 129176680817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131324164469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010185816 + ... + 1010185945.

It is an arithmetic number, because the mean of its divisors is an integer number (21213903501).

Almost surely, 2^131324164465 is an apocalyptic number.

It is an amenable number.

131324164465 is a deficient number, since it is larger than the sum of its proper divisors (38387063543).

131324164465 is a wasteful number, since it uses less digits than its factorization.

131324164465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020371779.

The product of its digits is 207360, while the sum is 40.

Adding to 131324164465 its reverse (564461423131), we get a palindrome (695785587596).

The spelling of 131324164465 in words is "one hundred thirty-one billion, three hundred twenty-four million, one hundred sixty-four thousand, four hundred sixty-five".