135787820585 has 8 divisors (see below), whose sum is σ = 163209481416. Its totient is φ = 108454192000.

The previous prime is 135787820579. The next prime is 135787820593. The reversal of 135787820585 is 585028787531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3784218256 + 132003602329 = 61516^2 + 363323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135787820585 - 2³⁴ = 118607951401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22004666 + ... + 22010835.

It is an arithmetic number, because the mean of its divisors is an integer number (20401185177).

Almost surely, 2^135787820585 is an apocalyptic number.

It is an amenable number.

135787820585 is a deficient number, since it is larger than the sum of its proper divisors (27421660831).

135787820585 is an equidigital number, since it uses as much as digits as its factorization.

135787820585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44016123.

The product of its (nonzero) digits is 18816000, while the sum is 59.

The spelling of 135787820585 in words is "one hundred thirty-five billion, seven hundred eighty-seven million, eight hundred twenty thousand, five hundred eighty-five".