136720056 has 64 divisors (see below), whose sum is σ = 376254720. Its totient is φ = 41054720.

The previous prime is 136720049. The next prime is 136720063. The reversal of 136720056 is 650027631.

136720056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (136720049) and next prime (136720063).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27541 + ... + 32123.

It is an arithmetic number, because the mean of its divisors is an integer number (5878980).

Almost surely, 2^136720056 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 136720056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188127360).

136720056 is an abundant number, since it is smaller than the sum of its proper divisors (239534664).

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

136720056 is a wasteful number, since it uses less digits than its factorization.

136720056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716 (or 4712 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 136720056 is about 11692.7351804443. The cubic root of 136720056 is about 515.1623028209.

Adding to 136720056 its reverse (650027631), we get a palindrome (786747687).

The spelling of 136720056 in words is "one hundred thirty-six million, seven hundred twenty thousand, fifty-six".