131503544665 has 8 divisors (see below), whose sum is σ = 157806209088. Its totient is φ = 105201532080.

The previous prime is 131503544663. The next prime is 131503544741. The reversal of 131503544665 is 566445305131.

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

It is not a de Polignac number, because 131503544665 - 2¹ = 131503544663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131503544663) 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, 645604 + ... + 824506.

It is an arithmetic number, because the mean of its divisors is an integer number (19725776136).

Almost surely, 2^131503544665 is an apocalyptic number.

It is an amenable number.

131503544665 is a deficient number, since it is larger than the sum of its proper divisors (26302664423).

131503544665 is a wasteful number, since it uses less digits than its factorization.

131503544665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325919.

The product of its (nonzero) digits is 648000, while the sum is 43.

Adding to 131503544665 its reverse (566445305131), we get a palindrome (697948849796).

The spelling of 131503544665 in words is "one hundred thirty-one billion, five hundred three million, five hundred forty-four thousand, six hundred sixty-five".