135612015021425 has 12 divisors (see below), whose sum is σ = 168635269455180. Its totient is φ = 108182275998720.

The previous prime is 135612015021419. The next prime is 135612015021449. The reversal of 135612015021425 is 524120510216531.

It can be written as a sum of positive squares in 6 ways, for example, as 10811008576 + 135601204012849 = 103976^2 + 11644793^2 .

It is not a de Polignac number, because 135612015021425 - 2¹⁰ = 135612015020401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7683391460 + ... + 7683409109.

It is an arithmetic number, because the mean of its divisors is an integer number (14052939121265).

Almost surely, 2^{135612015021425} is an apocalyptic number.

It is an amenable number.

135612015021425 is a deficient number, since it is larger than the sum of its proper divisors (33023254433755).

135612015021425 is a wasteful number, since it uses less digits than its factorization.

135612015021425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366800932 (or 15366800927 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 135612015021425 its reverse (524120510216531), we get a palindrome (659732525237956).

The spelling of 135612015021425 in words is "one hundred thirty-five trillion, six hundred twelve billion, fifteen million, twenty-one thousand, four hundred twenty-five".