136643320 has 32 divisors (see below), whose sum is σ = 335398320. Its totient is φ = 49688320.

The previous prime is 136643279. The next prime is 136643323. The reversal of 136643320 is 23346631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136643323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154837 + ... + 155716.

Almost surely, 2^136643320 is an apocalyptic number.

136643320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136643320 is an abundant number, since it is smaller than the sum of its proper divisors (198755000).

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

136643320 is a wasteful number, since it uses less digits than its factorization.

136643320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310575 (or 310571 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 136643320 is about 11689.4533661759. The cubic root of 136643320 is about 515.0659041559.

Adding to 136643320 its reverse (23346631), we get a palindrome (159989951).

The spelling of 136643320 in words is "one hundred thirty-six million, six hundred forty-three thousand, three hundred twenty".