136642730724 has 36 divisors (see below), whose sum is σ = 348822293820. Its totient is φ = 45096609600.

The previous prime is 136642730699. The next prime is 136642730737. The reversal of 136642730724 is 427037246631.

It can be written as a sum of positive squares in 2 ways, for example, as 83428545600 + 53214185124 = 288840^2 + 230682^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 136642730724.

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 in 11 ways as a sum of consecutive naturals, for example, 18786619 + ... + 18793890.

Almost surely, 2^136642730724 is an apocalyptic number.

It is an amenable number.

136642730724 is an abundant number, since it is smaller than the sum of its proper divisors (212179563096).

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

136642730724 is a wasteful number, since it uses less digits than its factorization.

136642730724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37580620 (or 37580615 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 136642730724 in words is "one hundred thirty-six billion, six hundred forty-two million, seven hundred thirty thousand, seven hundred twenty-four".