135816343618531 has 16 divisors (see below), whose sum is σ = 150058470196800. Its totient is φ = 122269025184768.

The previous prime is 135816343618469. The next prime is 135816343618607.

135816343618531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 135816343618531 - 2⁹ = 135816343618019 is a prime.

It is a super-2 number, since 2×135816343618531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135816343618331) 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, 197631625 + ... + 198317653.

It is an arithmetic number, because the mean of its divisors is an integer number (9378654387300).

Almost surely, 2^{135816343618531} is an apocalyptic number.

135816343618531 is a deficient number, since it is larger than the sum of its proper divisors (14242126578269).

135816343618531 is a wasteful number, since it uses less digits than its factorization.

135816343618531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192398.

The product of its digits is 18662400, while the sum is 58.

The spelling of 135816343618531 in words is "one hundred thirty-five trillion, eight hundred sixteen billion, three hundred forty-three million, six hundred eighteen thousand, five hundred thirty-one".