136566681444 has 72 divisors (see below), whose sum is σ = 369538260000. Its totient is φ = 42395353344.

The previous prime is 136566681413. The next prime is 136566681473. The reversal of 136566681444 is 444186665631.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651669 + ... + 1732380.

Almost surely, 2^136566681444 is an apocalyptic number.

It is an amenable number.

136566681444 is an abundant number, since it is smaller than the sum of its proper divisors (232971578556).

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

136566681444 is a wasteful number, since it uses less digits than its factorization.

136566681444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384137 (or 3384132 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 136566681444 in words is "one hundred thirty-six billion, five hundred sixty-six million, six hundred eighty-one thousand, four hundred forty-four".