136421660682 has 12 divisors (see below), whose sum is σ = 295580264850. Its totient is φ = 45473886888.

The previous prime is 136421660677. The next prime is 136421660689. The reversal of 136421660682 is 286066124631.

136421660682 is a `hidden beast` number, since 1 + 36 + 4 + 2 + 1 + 6 + 606 + 8 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 116732238921 + 19689421761 = 341661^2 + 140319^2 .

It is a super-2 number, since 2×136421660682² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136421660689) 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 5 ways as a sum of consecutive naturals, for example, 3789490557 + ... + 3789490592.

Almost surely, 2^136421660682 is an apocalyptic number.

136421660682 is an abundant number, since it is smaller than the sum of its proper divisors (159158604168).

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

136421660682 is a wasteful number, since it uses less digits than its factorization.

136421660682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578981157 (or 7578981154 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 136421660682 in words is "one hundred thirty-six billion, four hundred twenty-one million, six hundred sixty thousand, six hundred eighty-two".