136604521556 has 6 divisors (see below), whose sum is σ = 239057912730. Its totient is φ = 68302260776.

The previous prime is 136604521541. The next prime is 136604521567. The reversal of 136604521556 is 655125406631.

It can be written as a sum of positive squares in only one way, i.e., 136168380100 + 436141456 = 369010^2 + 20884^2 .

It is a super-2 number, since 2×136604521556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17075565191 + ... + 17075565198.

It is an arithmetic number, because the mean of its divisors is an integer number (39842985455).

Almost surely, 2^136604521556 is an apocalyptic number.

It is an amenable number.

136604521556 is a deficient number, since it is larger than the sum of its proper divisors (102453391174).

136604521556 is a wasteful number, since it uses less digits than its factorization.

136604521556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34151130393 (or 34151130391 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 136604521556 in words is "one hundred thirty-six billion, six hundred four million, five hundred twenty-one thousand, five hundred fifty-six".