135505444545 has 24 divisors (see below), whose sum is σ = 235184804712. Its totient is φ = 72174585600.

The previous prime is 135505444531. The next prime is 135505444549. The reversal of 135505444545 is 545444505531.

135505444545 is a `hidden beast` number, since 1 + 3 + 5 + 50 + 54 + 4 + 4 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1830385089 + 133675059456 = 42783^2 + 365616^2 .

It is not a de Polignac number, because 135505444545 - 2⁵ = 135505444513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 135505444545.

It is not an unprimeable number, because it can be changed into a prime (135505444549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1944226 + ... + 2012715.

It is an arithmetic number, because the mean of its divisors is an integer number (9799366863).

Almost surely, 2^135505444545 is an apocalyptic number.

135505444545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135505444545 is a deficient number, since it is larger than the sum of its proper divisors (99679360167).

135505444545 is a wasteful number, since it uses less digits than its factorization.

135505444545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957713 (or 3957710 counting only the distinct ones).

The product of its (nonzero) digits is 2400000, while the sum is 45.

The spelling of 135505444545 in words is "one hundred thirty-five billion, five hundred five million, four hundred forty-four thousand, five hundred forty-five".