131367645447 has 4 divisors (see below), whose sum is σ = 175156860600. Its totient is φ = 87578430296.

The previous prime is 131367645439. The next prime is 131367645481. The reversal of 131367645447 is 744546763131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131367645447 - 2³ = 131367645439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131367645447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131367645427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21894607572 + ... + 21894607577.

It is an arithmetic number, because the mean of its divisors is an integer number (43789215150).

Almost surely, 2^131367645447 is an apocalyptic number.

131367645447 is a deficient number, since it is larger than the sum of its proper divisors (43789215153).

131367645447 is an equidigital number, since it uses as much as digits as its factorization.

131367645447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43789215152.

The product of its digits is 5080320, while the sum is 51.

The spelling of 131367645447 in words is "one hundred thirty-one billion, three hundred sixty-seven million, six hundred forty-five thousand, four hundred forty-seven".