136731661000 has 128 divisors (see below), whose sum is σ = 350505792000. Its totient is φ = 49511616000.

The previous prime is 136731660997. The next prime is 136731661007. The reversal of 136731661000 is 166137631.

It is not an unprimeable number, because it can be changed into a prime (136731661007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2602996 + ... + 2655004.

It is an arithmetic number, because the mean of its divisors is an integer number (2738326500).

Almost surely, 2^136731661000 is an apocalyptic number.

136731661000 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 136731661000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175252896000).

136731661000 is an abundant number, since it is smaller than the sum of its proper divisors (213774131000).

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

136731661000 is a wasteful number, since it uses less digits than its factorization.

136731661000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52280 (or 52266 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

Adding to 136731661000 its reverse (166137631), we get a palindrome (136897798631).

The spelling of 136731661000 in words is "one hundred thirty-six billion, seven hundred thirty-one million, six hundred sixty-one thousand".