135396693531 has 64 divisors (see below), whose sum is σ = 220484782080. Its totient is φ = 81437184000.

The previous prime is 135396693517. The next prime is 135396693533.

135396693531 is a `hidden beast` number, since 13 + 5 + 3 + 9 + 6 + 6 + 93 + 531 = 666.

135396693531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 135396693531 - 2⁵ = 135396693499 is a prime.

It is a super-2 number, since 2×135396693531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135396693533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32933166 + ... + 32937276.

It is an arithmetic number, because the mean of its divisors is an integer number (3445074720).

Almost surely, 2^135396693531 is an apocalyptic number.

135396693531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135396693531 is a deficient number, since it is larger than the sum of its proper divisors (85088088549).

135396693531 is a wasteful number, since it uses less digits than its factorization.

135396693531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945 (or 4939 counting only the distinct ones).

The product of its digits is 5904900, while the sum is 54.

The spelling of 135396693531 in words is "one hundred thirty-five billion, three hundred ninety-six million, six hundred ninety-three thousand, five hundred thirty-one".