135807655566 has 16 divisors (see below), whose sum is σ = 296307612288. Its totient is φ = 41153835000.

The previous prime is 135807655561. The next prime is 135807655567. The reversal of 135807655566 is 665556708531.

It is a happy number.

It is a super-4 number, since 4×135807655566⁴ (a number of 46 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135807655561) 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, 1028845810 + ... + 1028845941.

It is an arithmetic number, because the mean of its divisors is an integer number (18519225768).

Almost surely, 2^135807655566 is an apocalyptic number.

135807655566 is an abundant number, since it is smaller than the sum of its proper divisors (160499956722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135807655566 is a wasteful number, since it uses less digits than its factorization.

135807655566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057691767.

The product of its (nonzero) digits is 22680000, while the sum is 57.

The spelling of 135807655566 in words is "one hundred thirty-five billion, eight hundred seven million, six hundred fifty-five thousand, five hundred sixty-six".