135618751 has 4 divisors (see below), whose sum is σ = 142756600. Its totient is φ = 128480904.

The previous prime is 135618739. The next prime is 135618767. The reversal of 135618751 is 157816531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157816531 = 4073 ⋅38747.

It is a cyclic number.

It is not a de Polignac number, because 135618751 - 2¹¹ = 135616703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135618751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135618551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568896 + ... + 3568933.

It is an arithmetic number, because the mean of its divisors is an integer number (35689150).

Almost surely, 2^135618751 is an apocalyptic number.

135618751 is a deficient number, since it is larger than the sum of its proper divisors (7137849).

135618751 is an equidigital number, since it uses as much as digits as its factorization.

135618751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137848.

The product of its digits is 25200, while the sum is 37.

The square root of 135618751 is about 11645.5464019513. The cubic root of 135618751 is about 513.7753299020.

The spelling of 135618751 in words is "one hundred thirty-five million, six hundred eighteen thousand, seven hundred fifty-one".