136561306620 has 48 divisors (see below), whose sum is σ = 391264030080. Its totient is φ = 35569455936.

The previous prime is 136561306589. The next prime is 136561306703. The reversal of 136561306620 is 26603165631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26462790 + ... + 26467949.

It is an arithmetic number, because the mean of its divisors is an integer number (8151333960).

Almost surely, 2^136561306620 is an apocalyptic number.

136561306620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136561306620 is an abundant number, since it is smaller than the sum of its proper divisors (254702723460).

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

136561306620 is a wasteful number, since it uses less digits than its factorization.

136561306620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52930794 (or 52930792 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 136561306620 in words is "one hundred thirty-six billion, five hundred sixty-one million, three hundred six thousand, six hundred twenty".