136772864 has 36 divisors (see below), whose sum is σ = 274302756. Its totient is φ = 68063232.

The previous prime is 136772851. The next prime is 136772869. The reversal of 136772864 is 468277631.

It can be written as a sum of positive squares in 2 ways, for example, as 33547264 + 103225600 = 5792^2 + 10160^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136772869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58502 + ... + 60794.

It is an arithmetic number, because the mean of its divisors is an integer number (7619521).

Almost surely, 2^136772864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136772864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137151378).

136772864 is an abundant number, since it is smaller than the sum of its proper divisors (137529892).

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

136772864 is an equidigital number, since it uses as much as digits as its factorization.

136772864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542 (or 2528 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 136772864 is about 11694.9931167145. The cubic root of 136772864 is about 515.2286212769.

The spelling of 136772864 in words is "one hundred thirty-six million, seven hundred seventy-two thousand, eight hundred sixty-four".