135623326531 has 16 divisors (see below), whose sum is σ = 169098186240. Its totient is φ = 105674662080.

The previous prime is 135623326511. The next prime is 135623326541.

135623326531 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135623326531 is a prime.

It is a super-2 number, since 2×135623326531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135623326511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805730 + ... + 1879336.

It is an arithmetic number, because the mean of its divisors is an integer number (10568636640).

Almost surely, 2^135623326531 is an apocalyptic number.

135623326531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135623326531 is a deficient number, since it is larger than the sum of its proper divisors (33474859709).

135623326531 is a wasteful number, since it uses less digits than its factorization.

135623326531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97554.

The product of its digits is 291600, while the sum is 40.

The spelling of 135623326531 in words is "one hundred thirty-five billion, six hundred twenty-three million, three hundred twenty-six thousand, five hundred thirty-one".