136664356540 has 24 divisors (see below), whose sum is σ = 287040281472. Its totient is φ = 54657145920.

The previous prime is 136664356531. The next prime is 136664356559. The reversal of 136664356540 is 45653466631.

It is a congruent 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, 406156 + ... + 662035.

It is an arithmetic number, because the mean of its divisors is an integer number (11960011728).

Almost surely, 2^136664356540 is an apocalyptic number.

136664356540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136664356540 is an abundant number, since it is smaller than the sum of its proper divisors (150375924932).

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

136664356540 is a wasteful number, since it uses less digits than its factorization.

136664356540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074597 (or 1074595 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 136664356540 in words is "one hundred thirty-six billion, six hundred sixty-four million, three hundred fifty-six thousand, five hundred forty".