135816567523 has 16 divisors (see below), whose sum is σ = 167858288640. Its totient is φ = 107009624736.

The previous prime is 135816567493. The next prime is 135816567529. The reversal of 135816567523 is 325765618531.

It is a de Polignac number, because none of the positive numbers 2^k-135816567523 is a prime.

It is a super-2 number, since 2×135816567523² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135816567529) 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, 3100615 + ... + 3144112.

It is an arithmetic number, because the mean of its divisors is an integer number (10491143040).

Almost surely, 2^135816567523 is an apocalyptic number.

135816567523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135816567523 is a deficient number, since it is larger than the sum of its proper divisors (32041721117).

135816567523 is a wasteful number, since it uses less digits than its factorization.

135816567523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6244986.

The product of its digits is 4536000, while the sum is 52.

The spelling of 135816567523 in words is "one hundred thirty-five billion, eight hundred sixteen million, five hundred sixty-seven thousand, five hundred twenty-three".