136784081745 has 12 divisors (see below), whose sum is σ = 237092408436. Its totient is φ = 72951510240.

The previous prime is 136784081741. The next prime is 136784081761. The reversal of 136784081745 is 547180487631.

136784081745 is a `hidden beast` number, since 1 + 3 + 67 + 8 + 408 + 174 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17087456961 + 119696624784 = 130719^2 + 345972^2 .

It is not a de Polignac number, because 136784081745 - 2² = 136784081741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136784081691 and 136784081700.

It is not an unprimeable number, because it can be changed into a prime (136784081741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1519823086 + ... + 1519823175.

It is an arithmetic number, because the mean of its divisors is an integer number (19757700703).

Almost surely, 2^136784081745 is an apocalyptic number.

136784081745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136784081745 is a deficient number, since it is larger than the sum of its proper divisors (100308326691).

136784081745 is a wasteful number, since it uses less digits than its factorization.

136784081745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039646272 (or 3039646269 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 136784081745 in words is "one hundred thirty-six billion, seven hundred eighty-four million, eighty-one thousand, seven hundred forty-five".