136664460 has 72 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 36115968.

The previous prime is 136664453. The next prime is 136664491. The reversal of 136664460 is 64466631.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 16981 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (5809440).

Almost surely, 2^136664460 is an apocalyptic number.

136664460 is a gapful number since it is divisible by the number (10) 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 136664460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209139840).

136664460 is an abundant number, since it is smaller than the sum of its proper divisors (281615220).

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

136664460 is a wasteful number, since it uses less digits than its factorization.

136664460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847 (or 6842 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 136664460 is about 11690.3575651047. The cubic root of 136664460 is about 515.0924646243.

The spelling of 136664460 in words is "one hundred thirty-six million, six hundred sixty-four thousand, four hundred sixty".