135315515525 has 12 divisors (see below), whose sum is σ = 168320559012. Its totient is φ = 107910915840.

The previous prime is 135315515521. The next prime is 135315515549. The reversal of 135315515525 is 525515513531.

It can be written as a sum of positive squares in 6 ways, for example, as 125462401 + 135190053124 = 11201^2 + 367682^2 .

It is not a de Polignac number, because 135315515525 - 2² = 135315515521 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 (135315515521) 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 11 ways as a sum of consecutive naturals, for example, 8529332 + ... + 8545181.

It is an arithmetic number, because the mean of its divisors is an integer number (14026713251).

Almost surely, 2^135315515525 is an apocalyptic number.

It is an amenable number.

135315515525 is a deficient number, since it is larger than the sum of its proper divisors (33005043487).

135315515525 is a wasteful number, since it uses less digits than its factorization.

135315515525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17074840 (or 17074835 counting only the distinct ones).

The product of its digits is 281250, while the sum is 41.

The spelling of 135315515525 in words is "one hundred thirty-five billion, three hundred fifteen million, five hundred fifteen thousand, five hundred twenty-five".