134581878443 has 4 divisors (see below), whose sum is σ = 134596094808. Its totient is φ = 134567662080.

The previous prime is 134581878401. The next prime is 134581878463. The reversal of 134581878443 is 344878185431.

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 134581878443 - 2³² = 130286911147 is a prime.

It is a super-2 number, since 2×134581878443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134581878463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7093973 + ... + 7112918.

It is an arithmetic number, because the mean of its divisors is an integer number (33649023702).

Almost surely, 2^134581878443 is an apocalyptic number.

134581878443 is a deficient number, since it is larger than the sum of its proper divisors (14216365).

134581878443 is an equidigital number, since it uses as much as digits as its factorization.

134581878443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14216364.

The product of its digits is 10321920, while the sum is 56.

The spelling of 134581878443 in words is "one hundred thirty-four billion, five hundred eighty-one million, eight hundred seventy-eight thousand, four hundred forty-three".