134144104136521 has 4 divisors (see below), whose sum is σ = 134241805597572. Its totient is φ = 134046402675472.

The previous prime is 134144104136501. The next prime is 134144104136557. The reversal of 134144104136521 is 125631401441431.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125757496647225 + 8386607489296 = 11214165^2 + 2895964^2 .

It is a cyclic number.

It is not a de Polignac number, because 134144104136521 - 2¹⁵ = 134144104103753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134144104136501) 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, 48850728466 + ... + 48850731211.

It is an arithmetic number, because the mean of its divisors is an integer number (33560451399393).

Almost surely, 2^{134144104136521} is an apocalyptic number.

It is an amenable number.

134144104136521 is a deficient number, since it is larger than the sum of its proper divisors (97701461051).

134144104136521 is an equidigital number, since it uses as much as digits as its factorization.

134144104136521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97701461050.

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 134144104136521 its reverse (125631401441431), we get a palindrome (259775505577952).

The spelling of 134144104136521 in words is "one hundred thirty-four trillion, one hundred forty-four billion, one hundred four million, one hundred thirty-six thousand, five hundred twenty-one".