136234505661 has 32 divisors (see below), whose sum is σ = 188668182528. Its totient is φ = 87382028160.

The previous prime is 136234505657. The next prime is 136234505681. The reversal of 136234505661 is 166505432631.

It is not a de Polignac number, because 136234505661 - 2² = 136234505657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136234505621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2582596 + ... + 2634818.

It is an arithmetic number, because the mean of its divisors is an integer number (5895880704).

Almost surely, 2^136234505661 is an apocalyptic number.

It is an amenable number.

136234505661 is a deficient number, since it is larger than the sum of its proper divisors (52433676867).

136234505661 is a wasteful number, since it uses less digits than its factorization.

136234505661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52561.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 136234505661 in words is "one hundred thirty-six billion, two hundred thirty-four million, five hundred five thousand, six hundred sixty-one".