135644521053 has 16 divisors (see below), whose sum is σ = 183851445056. Its totient is φ = 88934077440.

The previous prime is 135644521039. The next prime is 135644521057. The reversal of 135644521053 is 350125446531.

It is a happy number.

It is not a de Polignac number, because 135644521053 - 2¹⁴ = 135644504669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135644521057) 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 15 ways as a sum of consecutive naturals, for example, 1274301 + ... + 1376637.

It is an arithmetic number, because the mean of its divisors is an integer number (11490715316).

Almost surely, 2^135644521053 is an apocalyptic number.

It is an amenable number.

135644521053 is a deficient number, since it is larger than the sum of its proper divisors (48206924003).

135644521053 is a wasteful number, since it uses less digits than its factorization.

135644521053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109644.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 135644521053 its reverse (350125446531), we get a palindrome (485769967584).

The spelling of 135644521053 in words is "one hundred thirty-five billion, six hundred forty-four million, five hundred twenty-one thousand, fifty-three".