136685259626778 has 32 divisors (see below), whose sum is σ = 303810753395520. Its totient is φ = 45551893408560.

The previous prime is 136685259626761. The next prime is 136685259626779. The reversal of 136685259626778 is 877626952586631.

136685259626778 is a `hidden beast` number, since 1 + 3 + 6 + 68 + 525 + 9 + 6 + 26 + 7 + 7 + 8 = 666.

It is a super-2 number, since 2×136685259626778² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136685259626697 and 136685259626706.

It is not an unprimeable number, because it can be changed into a prime (136685259626779) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 273631500 + ... + 274130567.

It is an arithmetic number, because the mean of its divisors is an integer number (9494086043610).

Almost surely, 2^{136685259626778} is an apocalyptic number.

136685259626778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136685259626778 is an abundant number, since it is smaller than the sum of its proper divisors (167125493768742).

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

136685259626778 is a wasteful number, since it uses less digits than its factorization.

136685259626778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547766699 (or 547766693 counting only the distinct ones).

The product of its digits is 10973491200, while the sum is 81.

The spelling of 136685259626778 in words is "one hundred thirty-six trillion, six hundred eighty-five billion, two hundred fifty-nine million, six hundred twenty-six thousand, seven hundred seventy-eight".