135600121637 has 4 divisors (see below), whose sum is σ = 138485230656. Its totient is φ = 132715012620.

The previous prime is 135600121589. The next prime is 135600121667. The reversal of 135600121637 is 736121006531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 736121006531 = 41 ⋅17954170891.

It is a cyclic number.

It is not a de Polignac number, because 135600121637 - 2¹⁰ = 135600120613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135600121597 and 135600121606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135600121667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442554439 + ... + 1442554532.

It is an arithmetic number, because the mean of its divisors is an integer number (34621307664).

Almost surely, 2^135600121637 is an apocalyptic number.

It is an amenable number.

135600121637 is a deficient number, since it is larger than the sum of its proper divisors (2885109019).

135600121637 is an equidigital number, since it uses as much as digits as its factorization.

135600121637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885109018.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 135600121637 in words is "one hundred thirty-five billion, six hundred million, one hundred twenty-one thousand, six hundred thirty-seven".