135523401321551 has 8 divisors (see below), whose sum is σ = 135555783506640. Its totient is φ = 135491019854848.

The previous prime is 135523401321527. The next prime is 135523401321559. The reversal of 135523401321551 is 155123104325531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135523401321551 - 2¹⁴ = 135523401305167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135523401321499 and 135523401321508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135523401321559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667965560 + ... + 668168418.

It is an arithmetic number, because the mean of its divisors is an integer number (16944472938330).

Almost surely, 2^{135523401321551} is an apocalyptic number.

135523401321551 is a deficient number, since it is larger than the sum of its proper divisors (32382185089).

135523401321551 is a wasteful number, since it uses less digits than its factorization.

135523401321551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359193.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 135523401321551 in words is "one hundred thirty-five trillion, five hundred twenty-three billion, four hundred one million, three hundred twenty-one thousand, five hundred fifty-one".