131329755649 has 4 divisors (see below), whose sum is σ = 131643192240. Its totient is φ = 131016319060.

The previous prime is 131329755647. The next prime is 131329755719. The reversal of 131329755649 is 946557923131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131329755649 - 2¹ = 131329755647 is a prime.

It is a super-2 number, since 2×131329755649² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131329755649.

It is not an unprimeable number, because it can be changed into a prime (131329755647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 156717667 + ... + 156718504.

It is an arithmetic number, because the mean of its divisors is an integer number (32910798060).

Almost surely, 2^131329755649 is an apocalyptic number.

It is an amenable number.

131329755649 is a deficient number, since it is larger than the sum of its proper divisors (313436591).

131329755649 is an equidigital number, since it uses as much as digits as its factorization.

131329755649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313436590.

The product of its digits is 6123600, while the sum is 55.

The spelling of 131329755649 in words is "one hundred thirty-one billion, three hundred twenty-nine million, seven hundred fifty-five thousand, six hundred forty-nine".