135651262425221 has 8 divisors (see below), whose sum is σ = 143637147515520. Its totient is φ = 127666088342208.

The previous prime is 135651262425199. The next prime is 135651262425227. The reversal of 135651262425221 is 122524262156531.

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

It is a cyclic number.

It is not a de Polignac number, because 135651262425221 - 2³⁰ = 135650188683397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135651262425227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177358991 + ... + 178122188.

It is an arithmetic number, because the mean of its divisors is an integer number (17954643439440).

Almost surely, 2^{135651262425221} is an apocalyptic number.

It is an amenable number.

135651262425221 is a deficient number, since it is larger than the sum of its proper divisors (7985885090299).

135651262425221 is a wasteful number, since it uses less digits than its factorization.

135651262425221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355503643.

The product of its digits is 1728000, while the sum is 47.

The spelling of 135651262425221 in words is "one hundred thirty-five trillion, six hundred fifty-one billion, two hundred sixty-two million, four hundred twenty-five thousand, two hundred twenty-one".