136621056 has 176 divisors, whose sum is σ = 429182208. Its totient is φ = 38092800.

The previous prime is 136621021. The next prime is 136621063. The reversal of 136621056 is 650126631.

It is a tau number, because it is divible by the number of its divisors (176).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439141 + ... + 439451.

Almost surely, 2^136621056 is an apocalyptic number.

136621056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136621056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214591104).

136621056 is an abundant number, since it is smaller than the sum of its proper divisors (292561152).

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

136621056 is a wasteful number, since it uses less digits than its factorization.

136621056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 136621056 is about 11688.5010159558. The cubic root of 136621056 is about 515.0379285228.

Adding to 136621056 its reverse (650126631), we get a palindrome (786747687).

It can be divided in two parts, 1366 and 21056, that added together give a palindrome (22422).

The spelling of 136621056 in words is "one hundred thirty-six million, six hundred twenty-one thousand, fifty-six".