135617252525 has 12 divisors (see below), whose sum is σ = 168171673824. Its totient is φ = 108489750000.

The previous prime is 135617252443. The next prime is 135617252539. The reversal of 135617252525 is 525252716531.

It is a happy number.

It is not a de Polignac number, because 135617252525 - 2³⁴ = 118437383341 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 708350 + ... + 879200.

It is an arithmetic number, because the mean of its divisors is an integer number (14014306152).

Almost surely, 2^135617252525 is an apocalyptic number.

It is an amenable number.

135617252525 is a deficient number, since it is larger than the sum of its proper divisors (32554421299).

135617252525 is a wasteful number, since it uses less digits than its factorization.

135617252525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202612 (or 202607 counting only the distinct ones).

The product of its digits is 630000, while the sum is 44.

The spelling of 135617252525 in words is "one hundred thirty-five billion, six hundred seventeen million, two hundred fifty-two thousand, five hundred twenty-five".