135805261487 has 8 divisors (see below), whose sum is σ = 157836624000. Its totient is φ = 114431551704.

The previous prime is 135805261483. The next prime is 135805261499. The reversal of 135805261487 is 784162508531.

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

It is a cyclic number.

It is not a de Polignac number, because 135805261487 - 2² = 135805261483 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 (135805261483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164412737 + ... + 164413562.

It is an arithmetic number, because the mean of its divisors is an integer number (19729578000).

Almost surely, 2^135805261487 is an apocalyptic number.

135805261487 is a deficient number, since it is larger than the sum of its proper divisors (22031362513).

135805261487 is an equidigital number, since it uses as much as digits as its factorization.

135805261487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328826365.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 135805261487 in words is "one hundred thirty-five billion, eight hundred five million, two hundred sixty-one thousand, four hundred eighty-seven".