135652721240438 has 8 divisors (see below), whose sum is σ = 203479131645000. Its totient is φ = 67826344025440.

The previous prime is 135652721240389. The next prime is 135652721240459. The reversal of 135652721240438 is 834042127256531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 135652721240438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920813 + ... + 19228311.

It is an arithmetic number, because the mean of its divisors is an integer number (25434891455625).

Almost surely, 2^{135652721240438} is an apocalyptic number.

135652721240438 is a deficient number, since it is larger than the sum of its proper divisors (67826410404562).

135652721240438 is an equidigital number, since it uses as much as digits as its factorization.

135652721240438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16594782.

The product of its (nonzero) digits is 9676800, while the sum is 53.

Adding to 135652721240438 its reverse (834042127256531), we get a palindrome (969694848496969).

The spelling of 135652721240438 in words is "one hundred thirty-five trillion, six hundred fifty-two billion, seven hundred twenty-one million, two hundred forty thousand, four hundred thirty-eight".