135903559801 has 3 divisors (see below), whose sum is σ = 135903928453. Its totient is φ = 135903191150.

The previous prime is 135903559793. The next prime is 135903559807. The reversal of 135903559801 is 108955309531.

The square root of 135903559801 is 368651.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 135903559801 - 2³ = 135903559793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135903559807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 184326 + ... + 552976.

Almost surely, 2^135903559801 is an apocalyptic number.

135903559801 is the 368651-st square number.

135903559801 is the 184326-th centered octagonal number.

It is an amenable number.

135903559801 is a deficient number, since it is larger than the sum of its proper divisors (368652).

135903559801 is an frugal number, since it uses more digits than its factorization.

135903559801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737302 (or 368651 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 49.

Multiplying 135903559801 by its sum of digits (49), we get a square (6659274430249 = 2580557²).

The spelling of 135903559801 in words is "one hundred thirty-five billion, nine hundred three million, five hundred fifty-nine thousand, eight hundred one".