136640317544 has 16 divisors (see below), whose sum is σ = 256211669700. Its totient is φ = 68317205632.

The previous prime is 136640317519. The next prime is 136640317573. The reversal of 136640317544 is 445713046631.

It can be written as a sum of positive squares in 2 ways, for example, as 88036824100 + 48603493444 = 296710^2 + 220462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136640317495 and 136640317504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165917 + ... + 548460.

Almost surely, 2^136640317544 is an apocalyptic number.

It is an amenable number.

136640317544 is a deficient number, since it is larger than the sum of its proper divisors (119571352156).

136640317544 is a wasteful number, since it uses less digits than its factorization.

136640317544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738292 (or 738288 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 136640317544 in words is "one hundred thirty-six billion, six hundred forty million, three hundred seventeen thousand, five hundred forty-four".