136503187857 has 6 divisors (see below), whose sum is σ = 197171271362. Its totient is φ = 91002125232.

The previous prime is 136503187841. The next prime is 136503187861. The reversal of 136503187857 is 758781305631.

136503187857 is a `hidden beast` number, since 1 + 3 + 6 + 503 + 1 + 87 + 8 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 125894393856 + 10608794001 = 354816^2 + 102999^2 .

It is not a de Polignac number, because 136503187857 - 2⁴ = 136503187841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136503187817) 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, 7583510428 + ... + 7583510445.

Almost surely, 2^136503187857 is an apocalyptic number.

It is an amenable number.

136503187857 is a deficient number, since it is larger than the sum of its proper divisors (60668083505).

136503187857 is a wasteful number, since it uses less digits than its factorization.

136503187857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167020879 (or 15167020876 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 136503187857 in words is "one hundred thirty-six billion, five hundred three million, one hundred eighty-seven thousand, eight hundred fifty-seven".