135865557645 has 16 divisors (see below), whose sum is σ = 218948815680. Its totient is φ = 71940322944.

The previous prime is 135865557617. The next prime is 135865557647. The reversal of 135865557645 is 546755568531.

It is not a de Polignac number, because 135865557645 - 2⁷ = 135865557517 is a prime.

It is a super-3 number, since 3×135865557645³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135865557647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32579584 + ... + 32583753.

It is an arithmetic number, because the mean of its divisors is an integer number (13684300980).

Almost surely, 2^135865557645 is an apocalyptic number.

135865557645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135865557645 is a deficient number, since it is larger than the sum of its proper divisors (83083258035).

135865557645 is a wasteful number, since it uses less digits than its factorization.

135865557645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65163484.

The product of its digits is 75600000, while the sum is 60.

The spelling of 135865557645 in words is "one hundred thirty-five billion, eight hundred sixty-five million, five hundred fifty-seven thousand, six hundred forty-five".