134878621609 has 16 divisors (see below), whose sum is σ = 137805494400. Its totient is φ = 131966448640.

The previous prime is 134878621573. The next prime is 134878621667. The reversal of 134878621609 is 906126878431.

It is a cyclic number.

It is not a de Polignac number, because 134878621609 - 2¹³ = 134878613417 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 134878621609.

It is not an unprimeable number, because it can be changed into a prime (134878621699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38634354 + ... + 38637844.

It is an arithmetic number, because the mean of its divisors is an integer number (8612843400).

Almost surely, 2^134878621609 is an apocalyptic number.

It is an amenable number.

134878621609 is a deficient number, since it is larger than the sum of its proper divisors (2926872791).

134878621609 is a wasteful number, since it uses less digits than its factorization.

134878621609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 134878621609 in words is "one hundred thirty-four billion, eight hundred seventy-eight million, six hundred twenty-one thousand, six hundred nine".