136249680 has 80 divisors (see below), whose sum is σ = 482719104. Its totient is φ = 31142400.

The previous prime is 136249667. The next prime is 136249691. The reversal of 136249680 is 86942631.

It is a tau number, because it is divible by the number of its divisors (80).

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, 38871 + ... + 42230.

Almost surely, 2^136249680 is an apocalyptic number.

136249680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136249680 is an abundant number, since it is smaller than the sum of its proper divisors (346469424).

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

136249680 is a wasteful number, since it uses less digits than its factorization.

136249680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81124 (or 81118 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 136249680 is about 11672.6038226267. The cubic root of 136249680 is about 514.5708304407.

The spelling of 136249680 in words is "one hundred thirty-six million, two hundred forty-nine thousand, six hundred eighty".