135236551623 has 16 divisors (see below), whose sum is σ = 180535087200. Its totient is φ = 90047915136.

The previous prime is 135236551613. The next prime is 135236551657. The reversal of 135236551623 is 326155632531.

It is not a de Polignac number, because 135236551623 - 2¹⁷ = 135236420551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135236551613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17009053 + ... + 17017001.

It is an arithmetic number, because the mean of its divisors is an integer number (11283442950).

Almost surely, 2^135236551623 is an apocalyptic number.

135236551623 is a deficient number, since it is larger than the sum of its proper divisors (45298535577).

135236551623 is a wasteful number, since it uses less digits than its factorization.

135236551623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146.

The product of its digits is 486000, while the sum is 42.

The spelling of 135236551623 in words is "one hundred thirty-five billion, two hundred thirty-six million, five hundred fifty-one thousand, six hundred twenty-three".