135840686466 has 32 divisors (see below), whose sum is σ = 285998074560. Its totient is φ = 42894406656.

The previous prime is 135840686461. The next prime is 135840686477. The reversal of 135840686466 is 664686048531.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (135840686461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2708530 + ... + 2758226.

It is an arithmetic number, because the mean of its divisors is an integer number (8937439830).

Almost surely, 2^135840686466 is an apocalyptic number.

135840686466 is an abundant number, since it is smaller than the sum of its proper divisors (150157388094).

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

135840686466 is a wasteful number, since it uses less digits than its factorization.

135840686466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73698.

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 135840686466 in words is "one hundred thirty-five billion, eight hundred forty million, six hundred eighty-six thousand, four hundred sixty-six".