136813433689 has 9 divisors (see below), whose sum is σ = 137543373279. Its totient is φ = 136087353360.

The previous prime is 136813433651. The next prime is 136813433693. The reversal of 136813433689 is 986334318631.

The square root of 136813433689 is 369883.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3874440025 + 132938993664 = 62245^2 + 364608^2 .

It is a de Polignac number, because none of the positive numbers 2^k-136813433689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136813433699) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 78044437 + ... + 78046189.

It is an arithmetic number, because the mean of its divisors is an integer number (15282597031).

Almost surely, 2^136813433689 is an apocalyptic number.

136813433689 is the 369883-rd square number.

136813433689 is the 184942-nd centered octagonal number.

It is an amenable number.

136813433689 is a deficient number, since it is larger than the sum of its proper divisors (729939590).

136813433689 is an frugal number, since it uses more digits than its factorization.

136813433689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928 (or 1964 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 55.

The spelling of 136813433689 in words is "one hundred thirty-six billion, eight hundred thirteen million, four hundred thirty-three thousand, six hundred eighty-nine".