131329645649 has 32 divisors (see below), whose sum is σ = 138136078080. Its totient is φ = 124750080000.

The previous prime is 131329645627. The next prime is 131329645661. The reversal of 131329645649 is 946546923131.

It is a cyclic number.

It is not a de Polignac number, because 131329645649 - 2²⁴ = 131312868433 is a prime.

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 131329645649.

It is not an unprimeable number, because it can be changed into a prime (131329645669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91902467 + ... + 91903895.

It is an arithmetic number, because the mean of its divisors is an integer number (4316752440).

Almost surely, 2^131329645649 is an apocalyptic number.

It is an amenable number.

131329645649 is a deficient number, since it is larger than the sum of its proper divisors (6806432431).

131329645649 is a wasteful number, since it uses less digits than its factorization.

131329645649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913.

The product of its digits is 4199040, while the sum is 53.

The spelling of 131329645649 in words is "one hundred thirty-one billion, three hundred twenty-nine million, six hundred forty-five thousand, six hundred forty-nine".