136905683640 has 128 divisors (see below), whose sum is σ = 448145809920. Its totient is φ = 33182528000.

The previous prime is 136905683639. The next prime is 136905683641. The reversal of 136905683640 is 46386509631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136905683639) and next prime (136905683641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136905683641) 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, 10422757 + ... + 10435883.

It is an arithmetic number, because the mean of its divisors is an integer number (3501139140).

Almost surely, 2^136905683640 is an apocalyptic number.

136905683640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136905683640 is an abundant number, since it is smaller than the sum of its proper divisors (311240126280).

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

136905683640 is a wasteful number, since it uses less digits than its factorization.

136905683640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21053 (or 21049 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 136905683640 in words is "one hundred thirty-six billion, nine hundred five million, six hundred eighty-three thousand, six hundred forty".