136464144640 has 144 divisors (see below), whose sum is σ = 352849996800. Its totient is φ = 50411626496.

The previous prime is 136464144613. The next prime is 136464144667. The reversal of 136464144640 is 46441464631.

It is an interprime number because it is at equal distance from previous prime (136464144613) and next prime (136464144667).

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, 773841 + ... + 933679.

It is an arithmetic number, because the mean of its divisors is an integer number (2450347200).

Almost surely, 2^136464144640 is an apocalyptic number.

136464144640 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 136464144640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176424998400).

136464144640 is an abundant number, since it is smaller than the sum of its proper divisors (216385852160).

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

136464144640 is a wasteful number, since it uses less digits than its factorization.

136464144640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159912 (or 159898 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 136464144640 in words is "one hundred thirty-six billion, four hundred sixty-four million, one hundred forty-four thousand, six hundred forty".